Bone Broth: Benefits, Nutrition, Dosing, and Side Effects

Bone broth is a savory, nutrient-rich liquid made by simmering animal bones — often with attached connective tissue, cartilage, and sometimes residual meat — in water for an extended period, typically 12 to 48 hours. This prolonged cooking process extracts collagen, gelatin, amino acids, minerals, and other compounds. The resulting liquid contains significant protein (typically 8-10 grams per cup), with approximately 40-80% of that protein being collagen. Despite widespread health claims, direct clinical evidence for bone broth itself is limited — most supporting research involves isolated collagen supplements rather than bone broth as a whole food.

This article reviews the available evidence on bone broth and its key components, including collagen hydrolysate, gelatin, and glycine, covering benefits for joints, skin, gut health, and more — plus practical dosing guidance, safety considerations, and how bone broth compares to collagen supplements.

Table of Contents

• Overview
• Forms and Bioavailability
• Evidence for Benefits
• Recommended Dosing
• Safety and Side Effects
• Drug Interactions
• Dietary Sources
• References

Overview

Bone broth is a savory, nutrient-rich liquid made by simmering animal bones — often with attached connective tissue, cartilage, and sometimes residual meat — in water for an extended period, typically 12 to 48 hours, along with vegetables, aromatics, herbs, and spices [1][2][3]. This prolonged cooking process extracts collagen from the bones and connective tissues, which converts into gelatin during simmering, along with minerals, amino acids, and other compounds [1][4]. The resulting liquid contains significant amounts of protein (typically 8-10 grams per cup), potassium, and sodium, with smaller amounts of other minerals such as calcium, magnesium, phosphorus, and zinc [1][2][5].

The most nutritionally significant component of bone broth is collagen, the main structural protein found in bone and connective tissue. Approximately 40 to 80% of the total protein in bone broth consists of collagen, with beef-based broths tending toward the higher end of this range [1][6]. Collagen breaks down into gelatin during the simmering process, which in turn supplies key amino acids including glycine, proline, hydroxyproline, arginine, and glutamine [2][5]. Glycine content, for example, can range from 500 to 1,700 mg per cup depending on preparation [5].

Bone broth differs from regular broth and stock in important ways. Standard chicken or beef "broth" is made by simmering meat (on or off the bone) for a shorter period — typically 30 minutes to 6 hours — yielding a lighter liquid. Stock focuses on bones simmered for 4 to 12 hours. Bone broth extends the cooking time to 12-48 hours, maximizing gelatin and nutrient extraction [3][7][8]. The term "bone broth" emerged as a distinct marketing term in the early 2010s, driven by the paleo and keto diet movements, though the preparation itself is essentially a traditional stock [3][7][9].

Despite widespread popularity and numerous health claims — from boosting immune function and healing the gut to reducing joint pain and improving skin — the direct scientific evidence for bone broth itself is limited. Most supporting research involves isolated components (collagen hydrolysate, gelatin, glycine, or specific amino acids) rather than bone broth as a whole food [1][2][10]. No official recommended daily amount for bone broth has been established by any major health authority [10].

The consumption of bone-based broths traces back to prehistoric times. Evidence from the Stone Age indicates that early humans prepared broths by simmering animal bones using heated rocks dropped into animal hides or stomachs [11][12]. Traditional Chinese Medicine incorporated bone broths as short decoctions (2-3 hours) for everyday nourishment or long decoctions (12-24 hours) for restorative purposes [13]. European traditions ranged from Bronze Age bouillon-like preparations to medieval consommés and peasant stocks [13]. Jewish chicken soup, Japanese tonkotsu, and French consommé all represent culturally distinct bone broth traditions that persist today [14].

Bone broth is sold commercially as a liquid (ready-to-drink, frozen, or shelf-stable in cartons), as a powder that can be mixed with water, or as powder encapsulated in pill form [1]. The bone broth market expanded rapidly in the mid-2010s, with more than six times as many products marketed as containing bone broth in 2017 compared to 2015 [15].

Forms and Bioavailability

Collagen in Bone Broth vs. Supplemental Collagen

The collagen obtained from bone broth is primarily in the form of gelatin — collagen that has been partially hydrolyzed by the prolonged heat of simmering but not broken down as completely as enzymatically hydrolyzed collagen (collagen peptides) [1]. This distinction matters because the form of collagen determines how it is absorbed and utilized.

There are three main forms of supplemental collagen [1][16]:

• Gelatin — Collagen that has been denatured by heat. This is the dominant form in bone broth. Gelatin dissolves in hot water and forms a gel when cooled. It contains large polypeptide chains that must be broken down further during digestion.
• Collagen hydrolysate (collagen peptides) — Collagen that has been enzymatically broken down into smaller peptides (typically 2,000-5,000 daltons). This is the most commonly studied supplemental form. Studies in mice suggest that absorption may be greater with hydrolyzed collagen compared to gelatin, due to its smaller molecular size [1][16].
• Undenatured (native) collagen — Collagen in its intact, native triple-helix structure. Used at much lower doses (typically 10-40 mg/day) with a proposed mechanism involving immune tolerance rather than providing structural amino acids [1].

Although undenatured collagen, gelatin, and collagen hydrolysate may all be broken down in the gut to yield absorbable amino acids, the bioavailability differs. Collagen hydrolysate has the smallest molecular size and is therefore likely absorbed most efficiently [1][16]. Gelatin from bone broth undergoes further breakdown during digestion but may not achieve the same level of absorption as pre-hydrolyzed peptides.

Collagen Types

Collagen is classified by type based on its tissue of origin [1][2][16]:

• Type I collagen — Most abundant in the body, found primarily in skin, bone, tendons, and other connective tissue. The most common source of collagen hydrolysate supplements. Beef bone broth is generally richer in type I and type III collagen [17].
• Type II collagen — Found most abundantly in cartilage. Chicken bone broth, particularly when made with chicken feet, may contain higher proportions of type II collagen [17][18].
• Type III collagen — Found in skin, blood vessels, and internal organs. Often co-occurs with type I collagen.

Liquid vs. Powder vs. Capsule Forms

Form	Protein per serving	Collagen content	Convenience	Notes
Liquid bone broth	6-10 g per cup	~40-80% of protein	Low (refrigeration, heating)	Most traditional form. Gelling when cooled indicates high gelatin content [1][6].
Powdered bone broth	10-20 g per serving	Variable	High (shelf-stable, portable)	Higher concentrated protein due to dehydration. Gentle dehydration preserves most amino acids [19].
Bone broth capsules	1-3 g per serving	Variable	Highest	Very low doses compared to liquid or powder. Difficult to achieve therapeutic collagen doses [1].
Collagen hydrolysate (peptides)	10-20 g per serving	~100% collagen	High	Not bone broth, but the form most studied in clinical trials. Smaller molecular size, likely better absorbed [1][16].

Powdered forms typically lack the gelling property of quality liquid broth, as dehydration disrupts gelatin structure [19]. Nutrient retention varies: gentle dehydration preserves most amino acids (glycine, proline, etc.), but high-heat processing can partially denature proteins or reduce bioavailability [19].

Factors Affecting Nutrient Content

The nutrient composition of bone broth varies widely depending on preparation methods [20][21][22]:

• Cooking time: Longer cooking times (12-48 hours) increase mineral extraction and collagen breakdown. Calcium and magnesium levels rise significantly after 8 hours compared to shorter durations [20]. Shorter simmering (6-12 hours) favors gelatin retention (firmer gel), while longer times (24+ hours) promote further hydrolysis into smaller peptides with potentially greater bioavailability but reduced gelling capacity [5][13].
• Acidification: Adding vinegar or other acid substantially enhances mineral extraction. One study found acidification increased calcium extraction by factors of 10.6 to 23.6 and magnesium by 5.8 to 20.6 compared to unacidified broth [20]. Acid also facilitates collagen-to-gelatin conversion [2].
• Bone type: Bones with higher connective tissue and joint content yield more gelatin. Rib bones (with more cancellous structure) provide higher initial extraction of calcium, magnesium, and certain trace elements due to greater surface area, whereas long bones like femurs support more sustained calcium release over time [20].
• Animal source: A study in Australia found that amino acid content was significantly higher when broth was made from beef rather than chicken, from long bones (marrow-containing) rather than small bones, and when fat was not removed. The addition of vinegar did not influence amino acid content [22].
• Fat removal: Retaining fat in the broth may preserve some fat-soluble nutrients and increase amino acid content [22].

Evidence for Benefits

Joint Health and Osteoarthritis

There are no published clinical studies on the use of bone broth products specifically for arthritis or joint pain [1]. However, bone broth is a source of collagen and gelatin, and several studies suggest these components may be beneficial when taken in supplemental form.

Collagen hydrolysate for osteoarthritis: One of the largest studies with collagen hydrolysate enrolled patients with joint pain of the hip, knee, elbow, shoulder, hand, or lumbar spine. After 3 months, collagen hydrolysate was not more effective than placebo in reducing joint pain. However, after 6 months there was a statistically significant difference: 51.6% of people taking the collagen (Genacol) reported a reduction in pain compared to 36.5% of those taking placebo (Bruyere et al., Complement Ther Med, 2012) [23]. This suggests that collagen supplementation for joint pain requires at least 6 months to show benefit.

A smaller study in people with knee osteoarthritis found that taking 5 grams of collagen hydrolysate (collagen peptide) dissolved in a cup of water or milk in the morning and at night after food for 13 weeks significantly improved symptoms compared to placebo (Kumar et al., J Sci Food Agric, 2014) [24].

One study directly compared collagen hydrolysate to glucosamine sulfate and suggested greater benefit with collagen hydrolysate (Trc et al., Int Orthop, 2011) [25].

A meta-analysis of studies on hydrolyzed collagen supplements found reduced pain, improved mobility, and better function in osteoarthritis patients across randomized controlled trials [10]. Undenatured type II collagen has also shown reductions in pain and stiffness compared to placebo in some trials [10].

There is very limited evidence that collagen may help for rheumatoid arthritis [1].

Important caveat: Most of these studies used specific forms of hydrolyzed collagen, and most bone broth products do not list the form or amount of collagen they contain. Dietary collagen from bone broth is broken down into amino acids during digestion, and there is a lack of robust evidence that consuming bone broth directly confers the same joint benefits as purified collagen supplements [10].

Exercise-Related Joint Pain

Collagen may also help reduce joint pain associated with physical activity in healthy active adults. A study among 97 young men and women (average age 20) who were members of a college varsity team or sports club and who had joint pain or discomfort due to joint stress, injury, surgical outcome, or trauma, found that 10 grams of liquid collagen hydrolysate taken daily for approximately 5 months significantly reduced joint pain at rest (as assessed by a physician) and self-reported joint pain when running and walking compared to placebo. The study was funded by GELITA Health GmbH, Germany (Clark et al., Curr Med Res Opin, 2008) [26].

Another study funded by GELITA found that 5 grams of collagen peptides taken daily for six months by male and female athletes (average age 27) with chronic ankle instability led to improved self-reported ankle stability and function, and decreased pain and swelling, compared to placebo. The number of athletes reporting ankle sprains during a three-month follow-up period was also lower in the collagen group compared to placebo (9 vs. 24) (Dressler et al., J Sports Sci Med, 2018) [27].

Bone Health and Osteoporosis

In animal models, peptides from collagen hydrolysate accumulate preferentially in cartilage and bone after intestinal absorption, and collagen hydrolysate supplementation has been found to have beneficial effects on bone and to increase bone mineral density (Fanaro et al., Rev Bras Geriatr Gerontol, 2016) [28].

Human evidence is limited. A single study in the Czech Republic among 97 postmenopausal women (over 40 years old) with radiologic evidence of osteoporosis and bone mineral density of less than 80% found that taking 10 grams of collagen hydrolysate daily, in addition to treatment with calcitonin, for approximately six months was more effective in inhibiting bone collagen breakdown than calcitonin alone. However, this did not lead to statistically significant increases in bone mineral density (Adam et al., Cas Lek Cesk, 1996) [29].

Muscle Mass and Sarcopenia

There is evidence that collagen may help build muscle and increase muscle strength in older adults when combined with exercise. In a study among older men (average age 72) with sarcopenia (age-related muscle loss) who participated in a strength training program 3 days per week for 3 months, those who consumed a daily drink containing 15 grams of collagen peptides (BODYBALANCE, GELITA AG) had significantly greater increases in lean muscle mass and muscle strength compared to those who consumed a placebo drink (Zdzieblik et al., Br J Nutr, 2015) [30]. This finding is notable because it suggests collagen peptides can support muscle anabolism in older adults when paired with resistance exercise.

Skin Health, Wrinkles, and Nails

The best evidence supporting the use of collagen for aging skin comes from studies using VERISOL (Gelita AG), a collagen peptide made of hydrolyzed, porcine-derived type I collagen.

Wrinkle reduction: The most notable study focused on crow's feet wrinkles around the eyes of women ages 45 to 65. At 4 weeks of treatment with 2.5 grams of VERISOL daily, eye wrinkle volume was reduced by 7.2% compared to placebo and, at 8 weeks, by 20.1%. Even 4 weeks after treatment ended, wrinkle volume had decreased 11.5% more than placebo. Procollagen type I content increased by 65% compared to placebo after 8 weeks, and elastin increased by 18%. All findings were statistically significant (Proksch, Schunck, Skin Pharmacol Physiol, 2014) [31].

Skin elasticity: Another study among women (average age 48) found that those who took 2.5 grams or 5.0 grams of VERISOL daily for two months had a modest improvement in skin elasticity of the inner forearms, but no improvement in skin roughness or increase in hydration, compared to placebo. Increased skin elasticity was greatest in women over age 50; both doses were equally effective (Proksch, Segger, Skin Pharmacol Physiol, 2014) [32].

Skin hydration: A small study among men and women in Japan found that 3 grams of collagen peptides taken daily for three months modestly improved skin hydration and elasticity compared to placebo. The addition of 500 mg of vitamin C to the collagen peptides did not enhance these effects (Choi et al., J Cosmet Laser Ther, 2014) [33].

Nail health: A study in Brazil examined brittle nails but lacked a placebo control, making findings questionable. Women consumed 2.5 grams per day of bioactive collagen peptides (VERISOL) dissolved in water for 24 weeks. Nail growth was reported to have increased by 12% and the frequency of broken nails decreased by 42% compared to the period before collagen treatment (Hexsel et al., J Cosmet Dermatol, 2017) [34].

Immune Function

Bone broth is often promoted for boosting the immune system or helping reduce cold symptoms. However, these claims appear to be based on two very preliminary studies that used chicken soup, not bone broth specifically [1].

Laboratory study: One small laboratory study found that traditional chicken soup (including vegetables) inhibited the movement of neutrophils (a type of white blood cell). This suggests a possible anti-inflammatory effect — but not an immune "boosting" effect (Rennard et al., Chest, 2000) [35].

Nasal mucus study: A study among 15 healthy young adults without a respiratory infection found that compared to sipping cold water, sipping either hot water or chicken soup increased the movement of nasal mucus. The chicken soup was slightly more effective than hot water alone, but the effect lasted for less than 30 minutes (Saketkhoo et al., Chest, 1978) [36].

Neither study used bone broth specifically, and neither provides strong evidence for the immune-boosting claims commonly attributed to bone broth.

Gut Health and Digestive Disorders

Bone broth is frequently promoted for healing the gut and treating various digestive disorders, including "leaky gut syndrome" (increased intestinal permeability). The evidence is largely preclinical [1][10].

Gelatin tannate: Laboratory and animal studies suggest that a combination of gelatin and tannic acids (gelatin tannate) may help reinforce the mucous lining of the gut and reduce symptoms of colitis (Frasca et al., Clin Exp Gastroenterol, 2012; Scaldaferri et al., United European Gastroenterol J, 2014) [37][38]. However, it is unclear whether gelatin or collagen taken alone without tannic acid would produce the same effect [1].

Diarrhea in children: Gelatin tannate, in combination with proper rehydration, has been shown to effectively treat diarrhea in children and is sold in some countries for this use (Cagan et al., Med Sci Monit, 2017) [39].

Collagen levels in IBD: A study found that people with ulcerative colitis and Crohn's disease tended to have lower blood levels of collagen compared to healthy individuals (Koutroubakis et al., J Clin Pathol, 2003) [40]. However, it is unclear whether supplementing collagen would address this difference.

Amino acids and gut barrier: A recent review highlights that amino acids and minerals abundant in bone broth may support intestinal barrier integrity, reduce permeability, alleviate inflammation, and aid conditions like inflammatory bowel disease, drawing from animal studies and limited human data [10]. There does not appear to be any published clinical research on the effects of bone broth or collagen supplementation in people with leaky gut syndrome, ulcerative colitis, Crohn's disease, or other digestive conditions [1][10].

Cardiovascular Considerations

Bone broth has minimal direct impact on LDL cholesterol, as it is low in saturated fat and cholesterol [2]. Some preliminary studies indicate that certain peptides derived from collagen and hemoglobin in bone broth may exhibit mild ACE-inhibitor-like activity, potentially supporting blood pressure regulation [2]. However, evidence is limited and does not outweigh the sodium-related risks for people managing high blood pressure. The high sodium content of many commercial bone broths (200-450 mg or more per cup, sometimes exceeding 500 mg) is a significant concern for cardiovascular health [2][4].

Sleep

Glycine, an abundant amino acid derived from collagen in bone broth (500-1,700 mg per cup), has been studied for its effects on sleep quality [5]. Glycine acts as an inhibitory neurotransmitter that lowers core body temperature at bedtime — a critical signal for sleep onset [41]. Three randomized controlled trials have demonstrated that supplemental glycine (3 g before bed) improves subjective sleep quality, helps with falling asleep faster, and decreases next-day fatigue [42][43][44].

However, the glycine content of a single cup of bone broth (typically 500-1,700 mg) is below the 3,000 mg dose used in clinical trials. Consuming 2-3 cups of bone broth in the evening could approach therapeutic glycine levels, but this has not been directly studied.

Recommended Dosing

No Established Daily Requirement

There is no Recommended Dietary Allowance (RDA), Adequate Intake (AI), or Tolerable Upper Intake Level (UL) established for bone broth, gelatin, or collagen by any major health authority [1][10]. The following dosing guidance is derived from clinical trials on collagen and gelatin rather than bone broth specifically.

Clinical Trial Dosages for Collagen

Indication	Dose	Duration	Form Used	Key Study
Osteoarthritis pain	10-12 g/day	6+ months	Collagen hydrolysate	Bruyere 2012 [23], Kumar 2014 [24]
Exercise-related joint pain	5-10 g/day	5-6 months	Collagen hydrolysate/peptides	Clark 2008 [26], Dressler 2018 [27]
Skin wrinkles	2.5-5 g/day	8-12 weeks	Collagen peptides (VERISOL)	Proksch 2014 [31][32]
Skin hydration/elasticity	3-5 g/day	12 weeks	Collagen peptides	Choi 2014 [33]
Muscle mass (sarcopenia)	15 g/day	12 weeks + exercise	Collagen peptides (BODYBALANCE)	Zdzieblik 2015 [30]
Bone collagen breakdown	10 g/day	6 months	Collagen hydrolysate	Adam 1996 [29]
Nail health	2.5 g/day	24 weeks	Collagen peptides (VERISOL)	Hexsel 2017 [34]

Practical Bone Broth Dosing

A typical cup (240 mL) of bone broth provides approximately 6-10 grams of protein, of which about 40-80% is collagen — yielding roughly 2.5-8 grams of collagen per cup [1][6]. To achieve the 10-15 grams of collagen per day used in most clinical trials for joint health, consider consuming 2-3 cups of bone broth daily [1].

For skin benefits, which have been demonstrated at lower collagen doses (2.5-5 grams), a single cup of a high-quality bone broth may provide sufficient collagen.

When purchasing bone broth, look for products that list protein content of at least 6-10 grams per cup (8 fl oz / 240 mL). Verify that the broth is made with bone, joint, or cartilage, as these are the collagen-rich sources [1].

Product Context

Dr Brad Stanfield's MicroVitamin+ Powder includes 10 g of collagen peptides — a form chosen for its superior bioavailability compared to the gelatin found in bone broth — alongside 5 g of creatine monohydrate and 25 core vitamin and mineral ingredients (shop MicroVitamin+ Powder). For those seeking collagen specifically for skin or joint support, collagen peptides (hydrolysate) may offer more predictable dosing and absorption than bone broth, where collagen content varies with preparation.

Timing and Administration

No specific timing recommendations exist for bone broth consumption. For joint health, consistent daily intake for at least 6 months appears necessary based on clinical trial data [23]. Bone broth can be consumed warm as a beverage at any time of day, used as a cooking base, or incorporated into soups and stews. For sleep-related glycine benefits, consuming bone broth in the evening before bed may be reasonable given the mechanism of action (core body temperature reduction), though this has not been studied directly [41].

Safety and Side Effects

General Safety

Bone broth is generally quite safe to consume for most people [1]. It has been part of the human diet for thousands of years across virtually all cultures [11][12][13].

Gastrointestinal Effects

Mild to moderate gastrointestinal complaints have occasionally been reported in people taking collagen-based products, including nausea, upset stomach, diarrhea, gas, and bloating [50]. These effects tend to be mild and typically resolve with continued use or dose adjustment.

Other Reported Side Effects

Additional side effects reported with collagen or gelatin supplementation have been generally mild and include headache, dizziness, insomnia, loss of appetite, itchy or pustular skin rash, and canker sores [51][52]. Rarely, liver function abnormalities such as elevated levels of liver enzymes have been reported in studies using undenatured type II collagen (Zhang et al., Arthritis Rheum, 2008; Barnett et al., Arthritis Rheum, 1998) [51][52].

Sodium Content

Many commercial bone broths contain high levels of sodium — typically 200-450 mg or more per cup, with some brands exceeding 500 mg per serving [2][4]. A typical serving may provide around 20% of the recommended daily sodium value. Individuals with high blood pressure, kidney disease, or those following sodium-restricted diets should carefully check product labels and choose low-sodium varieties (ideally 140 mg or less per cup) or prepare homemade versions without added salt [1][4].

Heavy Metal Contamination

A concern unique to bone broth is the potential for heavy metal contamination, particularly lead. Bones sequester environmental lead accumulated during the animal's lifetime, and prolonged simmering can leach small amounts into the broth [53][20]. A 2013 study on organic chicken bone broth found elevated lead concentrations — some preparations contained lead levels over ten times higher than tap water (Monro et al., Med Hypotheses, 2013) [53]. However, absolute amounts remained low, and hazard quotients indicated minimal health risks under typical consumption patterns [20].

More recent independent testing of commercial bone broth products found no concerning amounts of lead or other heavy metals such as arsenic, cadmium, or mercury [54]. To minimize exposure, choose bones from grass-fed or pasture-raised animals, select products that are third-party tested for heavy metals, and rotate bone sources rather than relying on a single animal source [2][53].

Special Populations

• Kidney disease: Individuals with kidney disease should consult with their physician before consuming bone broth due to the high amounts of sodium and potassium in some products [1][55].
• Dialysis patients: Those on dialysis who have fluid intake restrictions should consult with their physician before consuming liquid bone broth (Gimbar et al., J Ren Nutr, 2017) [55].
• Pregnancy: Bone broth is generally considered safe during pregnancy as a whole-food source of protein and nutrients. However, standard precautions about sodium intake and heavy metal exposure apply.
• Histamine sensitivity: Bone broth that has been simmered for long periods may contain elevated levels of histamine, which could be problematic for individuals with histamine intolerance.

Drug Interactions

There are no well-documented clinically significant drug interactions specific to bone broth consumption. However, several considerations apply:

Sodium and Antihypertensive Medications

The high sodium content of many commercial bone broths may counteract the effects of antihypertensive medications (ACE inhibitors, ARBs, diuretics, calcium channel blockers). Patients on blood pressure medications should monitor sodium intake from bone broth and choose low-sodium options [1][4].

Potassium and Potassium-Sparing Diuretics

Some bone broths contain significant amounts of potassium (200-500 mg per cup). Patients taking potassium-sparing diuretics (spironolactone, amiloride, eplerenone) or potassium supplements should be aware of this additional potassium source to avoid hyperkalemia [1].

Warfarin and Anticoagulants

Bone broth itself does not contain significant amounts of vitamin K. However, bone broth made with vitamin K-rich vegetables (e.g., leafy greens) could potentially affect INR in patients taking warfarin. This is a theoretical concern rather than a documented interaction.

Renal Medications

Patients with chronic kidney disease who are on phosphate binders, potassium binders, or fluid restrictions should discuss bone broth consumption with their nephrologist, as the mineral and fluid content may complicate management [55].

Dietary Sources

Amino Acid Profile of Bone Broth

The nutritional value of bone broth derives primarily from the amino acids released during collagen breakdown [2][5]:

Amino Acid	Approximate Amount per Cup	Biological Role
Glycine	500-1,700 mg	Inhibitory neurotransmitter, collagen synthesis, glutathione production, core body temperature regulation [5][41]
Proline	300-1,000 mg	Collagen and elastin synthesis, wound healing, antioxidant defense [5]
Hydroxyproline	200-800 mg	Unique to collagen; provides structural stability to collagen fibrils [5]
Glutamine	Variable	Fuel for intestinal epithelial cells, immune cell function, conditionally essential during stress [5]
Arginine	Variable	Nitric oxide precursor, wound healing, immune function [5]
Alanine	Variable	Gluconeogenesis, energy metabolism [5]

Nutritional Profile Per Cup (240 mL)

Nutrient	Typical Range	Notes
Protein	6-10 g	Higher in beef than chicken broth [1][2][5]
Collagen (as gelatin)	2.5-8 g	~40-80% of total protein [1][6]
Calories	30-80 kcal	Varies with fat and protein content
Sodium	50-500+ mg	Highly variable; commercial broths often 200-450 mg [2][4]
Potassium	200-500 mg	Significant source [1]
Calcium	9-70 mg	Very low — poor calcium source [2][5][20]
Magnesium	5-20 mg	Low — modest contribution [2][20]
Phosphorus	30-100 mg	Moderate amounts [2][5]
Iron	Trace	Small amounts [2]
Zinc	Trace	Small amounts [2]

Calcium: A Common Misconception

Despite popular claims, bone broth is a poor source of calcium [2][5][20]. Calcium content is typically only 9-70 mg per cup, with USDA data often reporting 9-14 mg per cup for common commercial or homemade broths. This is far below the 1,000-1,200 mg daily requirement for most adults. For comparison, canned sardines with bones offer about 325 mg of calcium per 3-ounce serving, and canned salmon with bones about 180 mg per 3-ounce serving [2][45].

Bone Broth Is Not a Complete Protein

Bone broth's primary protein comes from collagen, which lacks sufficient amounts of all essential amino acids — particularly tryptophan and branched-chain amino acids — in the proportions needed to qualify as a complete protein [46]. Bone broth should not be relied upon as a sole protein source but rather as a supplement to a diet that includes complete protein sources.

Comparison of Bone Types

Animal Source	Flavor Profile	Collagen Type	Key Characteristics
Beef	Bold, hearty, rich	Type I, III	Higher overall collagen and gelatin. Denser bones require longer simmering. Higher amino acid content [17][22].
Chicken	Light, mild, versatile	Type II (esp. with feet)	Shorter cooking time. Traditional cold/flu remedy. Higher type II collagen from cartilage [17][18].
Pork	Rich, gelatinous	Type I, III	Extra-gelatinous texture, especially with pigs' feet. Substantial collagen extraction [18].
Fish	Delicate, light	Type I	Shortest preparation time. Contains omega-3 fatty acids and iodine [5][47].

Other Dietary Sources of Collagen and Gelatin

• Collagen peptide supplements — Provide pre-hydrolyzed collagen in standardized doses (typically 10-20 g per serving). Most studied form.
• Gelatin — Derived from collagen but not broken down as completely. Used in cooking and as a thickener.
• Chicken feet — Extremely rich in type II collagen and gelatin.
• Pig skin (pork rinds/chicharrones) — High in collagen.
• Fish skin — Rich in type I collagen.
• Slow-cooked meats with bone and connective tissue — Pot roasts, osso buco, braised short ribs.

Supporting Collagen Synthesis

The body's own collagen production requires several cofactors. Consuming these nutrients alongside collagen or bone broth may support endogenous collagen synthesis:

• Vitamin C — Essential cofactor for prolyl hydroxylase and lysyl hydroxylase, enzymes required for collagen cross-linking. Deficiency causes scurvy (collagen breakdown).
• Zinc — Required for collagen synthesis and wound healing.
• Copper — Cofactor for lysyl oxidase, which cross-links collagen fibers.
• Manganese — Involved in proteoglycan synthesis in cartilage.

Note that the study by Choi et al. (2014) found that adding 500 mg of vitamin C to collagen peptides did not enhance skin hydration or elasticity effects beyond collagen peptides alone [33].

Optimizing Homemade Bone Broth

Based on available research, the following practices maximize nutrient extraction [20][22]:

• Use bones with high connective tissue content (knuckles, joints, feet, marrow bones)
• Add 1-2 tablespoons of acid (apple cider vinegar or wine) to enhance mineral extraction [20]
• Simmer for at least 12 hours; 24 hours for beef bones [20]
• Prefer beef bones over chicken for higher amino acid content [22]
• Use long/marrow-containing bones rather than small bones [22]
• Do not remove fat until after straining (retains more amino acids) [22]
• Roast bones first at 400-450 degrees F for 30-60 minutes for deeper flavor [48]

Storage

Most bone broths need only be refrigerated after opening. Some products should be kept frozen and thawed prior to use [1]. Homemade bone broth remains safe in the refrigerator for 3-4 days and can be frozen for 2-3 months at best quality (safe indefinitely when frozen) [49].

References

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2. Grokipedia. "Bone Broth." https://grokipedia.com/page/Bone_Broth

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4. Hsu DJ, Lee CW, Tsai WC, Chien YC. "Essential and toxic metals in animal bone broths." Food Nutr Res. 2017;61(1):1347478. https://doi.org/10.1080/16546628.2017.1347478

5. Mar-Solís LM, Soto-Domínguez A, Rodríguez-Tovar LE, et al. "Bone broth amino acid content and mineral composition."

6. ConsumerLab product analysis: approximately 40-80% of protein in bone broths was collagen. ConsumerLab Review 2025.

7. Alcock RD, Shaw GC, Burke LM. "Bone Broth Unlikely to Provide Reliable Concentrations of Collagen Precursors Compared with Supplemental Sources of Collagen Used in Collagen Research." Int J Sport Nutr Exerc Metab. 2019;29(3):265-272. https://doi.org/10.1123/ijsnem.2018-0139

8. McGee H. On Food and Cooking: The Science and Lore of the Kitchen. Scribner, 2004.

9. Ruhlman M. "Bone Broth Is Just Stock." 2015.

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11. Stiner MC, Kuhn SL, Weiner S, Bar-Yosef O. "Differential Burning, Recrystallization, and Fragmentation of Archaeological Bone." J Archaeol Sci. 1995;22:223-237.

12. Fallon Morell S. Nourishing Broth. Grand Central Publishing, 2014.

13. Historical references. Traditional Chinese Medicine, Bronze Age, Celtic and Roman traditions.

14. Regional bone broth traditions. Japanese tonkotsu, Jewish chicken soup, French consommé.

15. Market growth data: more than six times as many bone broth products in 2017 vs. 2015.

16. Oesser S, Adam M, Babel W, Seifert J. "Oral administration of (14)C labeled gelatin hydrolysate leads to an accumulation of radioactivity in cartilage of mice (C57/BL)." J Nutr. 2000;130(10):2313-2316. https://doi.org/10.1093/jn/130.10.2313

17. Leon-Lopez A, Morales-Penaloza A, Martinez-Juarez VM, et al. "Hydrolyzed Collagen — Sources and Applications." Molecules. 2019;24(22):4031. https://doi.org/10.3390/molecules24224031

18. Alcock RD, Shaw GC, Burke LM. "Bone Broth Unlikely to Provide Reliable Concentrations of Collagen Precursors." Int J Sport Nutr Exerc Metab. 2019;29(3):265-272. https://doi.org/10.1123/ijsnem.2018-0139

19. Commercial forms and nutrient retention data.

20. Hsu DJ, Lee CW, Tsai WC, Chien YC. "Essential and toxic metals in animal bone broths." Food Nutr Res. 2017;61(1):1347478. https://doi.org/10.1080/16546628.2017.1347478

21. McCance RA, Sheldon W, Widdowson EM. "Bone and vegetable broth." Arch Dis Child. 1934;9(52):251-258. https://doi.org/10.1136/adc.9.52.251

22. Alcock RD, Shaw GC, Burke LM. "Bone Broth Unlikely to Provide Reliable Concentrations of Collagen Precursors." Int J Sport Nutr Exerc Metab. 2019;29(3):265-272. https://doi.org/10.1123/ijsnem.2018-0139

23. Bruyere O, Zegels B, Leonori L, et al. "Effect of collagen hydrolysate in articular pain." Complement Ther Med. 2012;20(3):124-130. https://doi.org/10.1016/j.ctim.2011.12.007

24. Kumar S, Sugihara F, Suzuki K, et al. "Effectiveness of collagen peptide on osteoarthritis." J Sci Food Agric. 2015;95(4):702-707. https://doi.org/10.1002/jsfa.6752

25. Trc T, Bohmova J. "Efficacy and tolerance of enzymatic hydrolysed collagen vs. glucosamine sulphate in knee osteoarthritis." Int Orthop. 2011;35(3):341-348. https://doi.org/10.1007/s00264-010-1010-z

26. Clark KL, Sebastianelli W, Flechsenhar KR, et al. "24-Week study on collagen hydrolysate in athletes with activity-related joint pain." Curr Med Res Opin. 2008;24(5):1485-1496. https://doi.org/10.1185/030079908X291967

27. Dressler P, Gehring D, Zdzieblik D, et al. "Improvement of Functional Ankle Properties Following Supplementation with Specific Collagen Peptides." J Sports Sci Med. 2018;17(2):298-304. https://pubmed.ncbi.nlm.nih.gov/29769831/

28. Fanaro GB, Marques MR. "Collagen hydrolysate and its relationship with bone metabolism." Rev Bras Geriatr Gerontol. 2016;19(1):153-164.

29. Adam M, Spacek P, Hulejova H, et al. "Postmenopausal osteoporosis: Treatment with calcitonin and a diet rich in collagen proteins." Cas Lek Cesk. 1996;135(3):74-78. https://pubmed.ncbi.nlm.nih.gov/8646552/

30. Zdzieblik D, Oesser S, Baumstark MW, et al. "Collagen peptide supplementation in combination with resistance training improves body composition and increases muscle strength in elderly sarcopenic men." Br J Nutr. 2015;114(8):1237-1245. https://doi.org/10.1017/S0007114515002810

31. Proksch E, Schunck M, Zague V, et al. "Oral intake of specific bioactive collagen peptides reduces skin wrinkles and increases dermal matrix synthesis." Skin Pharmacol Physiol. 2014;27(3):113-119. https://doi.org/10.1159/000355523

32. Proksch E, Segger D, Degwert J, et al. "Oral supplementation of specific collagen peptides has beneficial effects on human skin physiology." Skin Pharmacol Physiol. 2014;27(1):47-55. https://doi.org/10.1159/000351376

33. Choi SY, Ko EJ, Lee YH, et al. "Effects of collagen tripeptide supplement on skin properties." J Cosmet Laser Ther. 2014;16(3):132-137. https://doi.org/10.3109/14764172.2013.854119

34. Hexsel D, Zague V, Schunck M, et al. "Oral supplementation with specific bioactive collagen peptides improves nail growth and reduces symptoms of brittle nails." J Cosmet Dermatol. 2017;16(4):520-526. https://doi.org/10.1111/jocd.12393

35. Rennard BO, Ertl RF, Gossman GL, et al. "Chicken soup inhibits neutrophil chemotaxis in vitro." Chest. 2000;118(4):1150-1157. https://doi.org/10.1378/chest.118.4.1150

36. Saketkhoo K, Januszkiewicz A, Sackner MA. "Effects of drinking hot water, cold water, and chicken soup on nasal mucus velocity." Chest. 1978;74(4):408-410. https://doi.org/10.1378/chest.74.4.408

37. Frasca G, Cardile V, Puglia C, et al. "Gelatin tannate reduces the proinflammatory effects of lipopolysaccharide in human intestinal epithelial cells." Clin Exp Gastroenterol. 2012;5:61-67. https://doi.org/10.2147/CEG.S28792

38. Scaldaferri F, Petito V, Lopetuso L, et al. "Gelatin tannate reduces symptoms of colitis in an animal model." United European Gastroenterol J. 2014;2(suppl 1).

39. Cagan E, Ceylan S, Mengi S, Sik G. "Gelatin tannate for acute diarrhea in children." Med Sci Monit. 2017;23:2029-2034. https://doi.org/10.12659/MSM.903150

40. Koutroubakis IE, Petinaki E, Dimoulios P, et al. "Serum laminin and collagen IV in inflammatory bowel disease." J Clin Pathol. 2003;56(11):817-820. https://doi.org/10.1136/jcp.56.11.817

41. Bannai M, Kawai N. "New therapeutic strategy for amino acid medicine: glycine improves the quality of sleep." J Pharmacol Sci. 2012;118(2):145-148. https://doi.org/10.1254/jphs.11R04FM

42. Inagawa K, Hiraoka T, Kohda T, et al. "Subjective effects of glycine ingestion before bedtime on sleep quality." Sleep Biol Rhythms. 2006;4(1):75-77. https://doi.org/10.1111/j.1479-8425.2006.00193.x

43. Yamadera W, Inagawa K, Chiba S, et al. "Glycine ingestion improves subjective sleep quality in human volunteers." Sleep Biol Rhythms. 2007;5(2):126-131. https://doi.org/10.1111/j.1479-8425.2007.00262.x

44. Bannai M, Kawai N, Ono K, et al. "The Effects of Glycine on Subjective Daytime Performance in Partially Sleep-Restricted Healthy Volunteers." Front Neurol. 2012;3:61. https://doi.org/10.3389/fneur.2012.00061

45. U.S. Department of Agriculture, FoodData Central. https://fdc.nal.usda.gov/

46. Guzman F. "Collagen as an incomplete protein." Nutritional analyses of bone broth protein quality.

47. Mosquera M, Gimenez B, da Silva IM, et al. "Nanoencapsulation of an active peptidic fraction from sea bream scales collagen." Food Chem. 2014;156:144-150. https://doi.org/10.1016/j.foodchem.2014.02.011

48. Traditional bone broth preparation: roasting at 400-450 degrees F for Maillard reaction.

49. USDA Food Safety and Inspection Service. Homemade broth storage: 3-4 days refrigerated, 2-3 months frozen at best quality.

50. Vijven JPJ, Luijsterburg PA, Verhagen AP, et al. "Symptomatic and chondroprotective treatment with collagen derivatives in osteoarthritis: a systematic review." Osteoarthritis Cartilage. 2012;20(8):809-821. https://doi.org/10.1016/j.joca.2012.04.008

51. Zhang Y, et al. "Treatment of early rheumatoid arthritis with minocycline versus placebo." Arthritis Rheum. 2008.

52. Barnett ML, et al. "Treatment of rheumatoid arthritis with oral type II collagen." Arthritis Rheum. 1998;41(2):290-297. https://doi.org/10.1002/1529-0131(199802)41:2<290::AID-ART13>3.0.CO;2-#

53. Monro JA, Leon R, Puri BK. "The risk of lead contamination in bone broth diets." Med Hypotheses. 2013;80(4):389-390. https://doi.org/10.1016/j.mehy.2012.12.026

54. Recent independent testing of commercial bone broth products finding no concerning heavy metal amounts.

55. Gimbar RP, Friedman AN. "Renal considerations in bone broth diets." J Ren Nutr. 2017;27(4):e23-e25. https://doi.org/10.1053/j.jrn.2017.01.024