Bone broth benefits include a source of easily digestible protein, collagen and its breakdown products (gelatin and amino acids like glycine and proline), and minerals leached from bones during long, slow cooking, though scientific evidence for many of its more dramatic health claims — like “healing the gut” or dramatically improving joint health — is limited and largely based on the properties of its individual components rather than direct clinical trials on bone broth itself. It’s a nutritious, comforting food that can reasonably support overall protein intake and hydration, but it’s not a scientifically proven cure for specific health conditions.
This guide covers what’s actually in bone broth, which claims have real evidence behind them, which are overstated, and how to make or choose a good one.
What Is Bone Broth?
Bone broth is made by simmering animal bones (and often connective tissue, like joints or feet) in water for an extended period, typically 12-24 hours or longer, which is considerably longer than a standard broth or stock. This extended cooking time is intended to extract more collagen, minerals, and amino acids from the bones and connective tissue than a quicker-cooked broth would provide, resulting in a broth that often gels when cooled due to its higher gelatin content.
What’s Actually in Bone Broth?
Protein and Amino Acids
Bone broth contains protein, primarily from collagen breakdown, including notable amounts of glycine and proline, amino acids that are components of collagen structure throughout the body, along with glutamine, an amino acid involved in various metabolic processes.
Collagen and Gelatin
Long cooking breaks down collagen from bones and connective tissue into gelatin, a more digestible form; this is what gives properly made bone broth its characteristic gel-like consistency when refrigerated.
Minerals
Some minerals, including calcium, magnesium, and phosphorus, leach from bones into the broth during cooking, though the actual concentration is generally lower than commonly claimed in wellness marketing, and it varies significantly based on cooking time, bone type, and whether acid (like vinegar) was added to help extract minerals.
Modest Vitamins
Bone broth isn’t a significant source of most vitamins, since these come primarily from soft tissue and produce rather than bone itself, though any vegetables added during cooking contribute some.
What Are the Real, Evidence-Supported Benefits of Bone Broth?
Protein Intake
Bone broth provides a source of protein, particularly useful for people who have difficulty eating solid food (during illness or recovery, for example) or who want an easily digestible way to increase protein intake.
Hydration
As a warm liquid, bone broth contributes to fluid intake and can be a comforting way to stay hydrated, particularly during illness when appetite for solid food may be reduced.
Glycine’s General Roles
Glycine, present in meaningful amounts in bone broth, has been studied for potential roles in sleep quality and as a component of the body’s own collagen production, though these studies generally use isolated glycine supplements rather than bone broth itself, making it hard to directly attribute the same effects to broth consumption.
Comfort and Appetite During Illness
Bone broth’s traditional use as a comfort food during illness has practical merit — it’s easy to digest, hydrating, and can be more appealing than solid food when appetite is low, even without unique medicinal properties beyond these practical benefits.
Claims That Are Overstated or Unproven
“Heals Leaky Gut”
While the amino acids in bone broth (particularly glutamine) have been studied for roles in intestinal lining health in some contexts, the specific claim that bone broth “heals” or “seals” a leaky gut lacks direct clinical evidence in humans, and the concept of leaky gut syndrome itself is not a recognized medical diagnosis outside of specific conditions.
“Cures Joint Pain”
Bone broth’s collagen content is sometimes marketed as a joint health solution, but the collagen in broth isn’t necessarily absorbed and delivered specifically to joint tissue any differently than other dietary protein sources; hydrolyzed collagen supplements, studied specifically for joint benefits in clinical trials, have more direct evidence than bone broth itself for this particular claim.
“Detoxifies the Body”
As with most “detox” claims applied to specific foods, this significantly overstates what bone broth can do; the body’s detoxification processes are handled by the liver and kidneys regardless of diet, and no food, including bone broth, performs a unique detoxifying function.
“Dramatically Improves Skin”
While the amino acids in bone broth are components the body could theoretically use for collagen production, there’s no strong direct clinical evidence that drinking bone broth specifically produces measurable, meaningful skin improvements the way clinical trials on hydrolyzed collagen supplements have shown for some skin outcomes.
Is Lead Contamination a Real Concern With Bone Broth?
This is a legitimate question that occasionally surfaces in bone broth discussions, since bones can accumulate trace amounts of lead over an animal’s lifetime, and prolonged cooking has raised some concern about lead leaching into broth. A few small studies have found detectable, though generally low, levels of lead in some bone broth samples, particularly those made with extended cooking times. For most people consuming bone broth occasionally as part of a varied diet, this is unlikely to pose a meaningful health risk, but pregnant women and young children, who are more vulnerable to lead exposure, may reasonably choose to limit very frequent, high-volume bone broth consumption or opt for reputable brands that test for heavy metals, as a matter of general caution rather than confirmed significant danger.
Bone Broth vs. Regular Broth or Stock
The main practical difference is cooking time and resulting gelatin content — bone broth’s extended simmering time extracts more collagen and gelatin from bones and connective tissue than a standard stock or broth cooked for a shorter period, generally 1-4 hours. This gives bone broth a thicker, more gel-like consistency when cooled and typically a somewhat higher protein content per serving, though the nutritional difference between a well-made stock and bone broth is often smaller in practice than marketing suggests, since both derive from similar ingredients and processes, just with different cooking durations.
Is Bone Broth Worth Drinking Regularly?
For most people, bone broth is a reasonably nutritious, low-calorie source of protein and hydration that can fit well into a balanced diet, particularly as a comforting addition during illness, cold weather, or as a savory alternative to other beverages. It’s worth approaching the more dramatic health claims — gut healing, joint cures, detoxification — with skepticism, since these aren’t well supported by direct clinical evidence specific to bone broth, even though some of its individual components have been studied in isolated, concentrated forms for related purposes.
How to Make or Choose Good Bone Broth
For homemade broth, use a mix of bones (including joints, which are particularly rich in connective tissue) and simmer for 12-24 hours, adding a splash of vinegar early in cooking, which may help extract more minerals and collagen from the bones. For store-bought options, look for a broth that gels when refrigerated, a sign of meaningful gelatin content, and check the sodium content, since many commercial broths are quite high in sodium, which matters for people managing blood pressure or sodium intake.
Frequently Asked Questions
Does bone broth really heal your gut?
There’s no strong direct clinical evidence supporting this specific claim; while some components of bone broth (like glutamine) have been studied for roles related to intestinal health, drinking bone broth itself hasn’t been shown in clinical trials to “heal” the gut lining.
Is bone broth good for joint pain?
Bone broth contains collagen-related compounds, but direct evidence for bone broth specifically improving joint pain is limited; hydrolyzed collagen supplements, studied in more controlled clinical trials, have more direct evidence for this particular benefit.
How much protein is in bone broth?
Protein content varies by preparation and brand, but homemade or well-made bone broth typically provides somewhere between 6-12 grams of protein per cup, making it a modest rather than primary protein source compared to meat, eggs, or protein powder.
Can you drink bone broth every day?
Yes, for most healthy people, daily bone broth consumption is generally safe within an overall balanced diet, though people managing sodium intake should check the sodium content of store-bought versions, which can be quite high.
Is bone broth better than regular broth or stock?
Bone broth generally has higher gelatin and protein content due to its longer cooking time, but the practical nutritional difference from a well-made stock is often smaller than marketing suggests, and both can be reasonable, nutritious choices.
Does bone broth help with weight loss?
Bone broth is low in calories and provides protein, which can support satiety as part of an overall calorie-controlled diet, but it doesn’t have unique fat-burning properties beyond its general contribution to protein intake and hydration.
Is bone broth safe during pregnancy?
Bone broth is generally considered safe during pregnancy as a source of protein and hydration, though pregnant women may want to be mindful of sodium content in store-bought versions and, out of general caution around trace lead exposure, avoid very frequent, high-volume homemade broth made with extremely long cooking times.
Can bone broth go bad, and how should it be stored?
Yes, like any perishable liquid, bone broth should be refrigerated and used within about 4-5 days, or frozen for longer storage (typically up to 3 months); properly made bone broth will often solidify into a gel-like consistency when chilled, which is a sign of good gelatin content, not spoilage.
Related Reading
- Collagen supplements benefits: what the research actually shows
- Best fiber foods for digestion
- Gut health supplements guide: what actually works
Informational only — not medical advice. See a doctor or registered dietitian for personalized nutrition guidance, especially if managing a chronic health condition.
