IngredientsBone marrow is a semi-solid tissue found within the internal cavities of bones, particularly the long (femur, tibia) and flat (sternum, ileum, ribs) bones of vertebrate animals. As a dietary ingredient and supplement, it is most commonly derived from bovine (Bos taurus) species, though it is also obtained from sheep, goat, pork, moose, deer, and chicken sources. There is no single accepted botanical or pharmacopeial Latin binomial for bone marrow as a supplement ingredient; in commerce it is typically labelled as bovine bone marrow extract, whole bone extract, or by the broader term bone marrow complex, often specified as "grass-fed" or "pasture-raised" bovine.
Two physiologically and compositionally distinct types of marrow exist in mammals:
As a dietary supplement ingredient, "bone marrow" typically refers to material derived from the yellow (fatty) marrow of long bones, and commercial products most frequently use bovine femur or tibia. The ingredient may be processed together with bone matrix and cartilage under the broader label "whole bone extract."
Bone marrow is encountered in several forms in both food and supplement contexts:
The use of bone marrow as human food is among the oldest documented dietary practices known to science. Archaeological evidence shows that early humans consumed bone marrow at least 2.5 million years ago; the use of tools to crack open bones for accessing marrow suggests its value as a highly nutritious food source, providing essential fats, proteins, and calories necessary for survival. Marrow would have been a useful food source largely due to its fat content for tool-using hominids, who were able to crack open the bones of carcasses left by apex predators such as lions and wolves; stones shaped like hand-sized balls have been revealed as tools used for cracking open bones to access the marrow, and go back almost 2 million years.
Archaeologists have determined that Neanderthals rendered fat from bone marrow at relatively large volumes as early as 125,000 years ago. Research published in Science Advances documented even more sophisticated behavior: evidence shows that 420,000 to 200,000 years ago, prehistoric humans at Qesem Cave (Israel) were sophisticated enough to know that it was possible to preserve particular bones of animals under specific conditions, and when necessary remove the skin, crack the bone, and eat the bone marrow β representing the earliest evidence in the world of food preservation and delayed consumption of food.
During the Paleolithic period, bone marrow extraction was an essential source of fat nutrients for hunter-gatherers, especially throughout cold and dry seasons; this is attested by the recurrent findings of percussion marks in osteological material from anthropized archaeological levels.
The best ethnographic data on delayed consumption of bone grease is from historic cultures of the Great Plains, actively involved in the production of pemmican, a substance composed of dried meat and fat. This product had a high nutritional value and could be stored for up to three years, was often produced in concert with the large fall harvest and the processing of bison, and was critical for survival during the winter months.
Many cultures have used bone marrow as food throughout history. Specific culinary traditions involving bone marrow have been well documented across multiple regions:
In the classical Indian medical system of Ayurveda, bone marrow is recognized as a distinct and significant tissue type called majja dhatu. Ayurveda recognizes seven tissue layers known as the dhatus, which work together in harmony to create the physical structure and support overall health; the sixth tissue in this system, after rasa, rakta, mamsa, meda, and ashti, is known as majja dhatu. Bone marrow, according to Ayurveda, is one among the four types of best unctuous substances useful in treating many diseases, the other three being ghee, oil, and muscle fat. Bone marrow was understood to occupy bones, give the body strength, promote reproductive tissues, and enhance sexual vitality. Bone marrow is considered the sixth tissue to be formed in the sequence of tissue formation according to Ayurvedic treatises and literature.
Within Traditional Chinese Medicine (TCM), the concept of bone marrow is tightly linked to the Kidney organ system (which governs bone, marrow, and brain in TCM theory). In TCM, conditions affecting marrow and blood production belong mainly to the category of "myeloid fatigue," "blood disease," and "consumptive disease," which are understood to be caused by spleen and kidney deficiency, blood collateral damage, and blood stasis. Herbal formulas were developed to nourish blood and support marrow production; for instance, formulas such as Si Wu Tang were used to nourish the blood and, by extension, marrow. The consumption of marrow-rich bone broths as a food-based medicine (alongside herbal decoctions) was practiced widely in Chinese culinary medicine.
Bone marrow was viewed as a sacred food in many ancient Native American cultures; it was used as a special part of the diet of growing children and even served as a substitute for breast milk when such was not available. The use of marrow in pemmican by Great Plains cultures (described above) represents one of the most well-documented traditional preparations, combining rendered marrow fat with dried bison meat to create a high-calorie, long-preserving food critical to survival through winters.
A 100g serving of beef bone marrow contains approximately 780β850 kcal, 84g of fat, and 7g of protein; it is energy-dense and not a primary protein source. The fat fraction is composed predominantly of monounsaturated and saturated fats, with oleic acid (a monounsaturated omega-9) typically the most abundant individual fatty acid. The fatty acid profile of bone marrow is influenced by the diet of the source animal: the fatty acid content can be modified by various nutritional additives, and this issue has been relatively well investigated in livestock; the composition of fatty acids of animal products reflects both tissue biosynthesis of fatty acids and the fatty acid profile of lipids supplied with nutrition.
Bone marrow provides a small amount of the B vitamins pantothenic acid, thiamine, and biotin, which are needed for important bodily processes including energy production; it is also rich in collagen, the most abundant protein in the body. It provides essential nutrients including vitamins A and K2, omega-3 and omega-6 fatty acids, iron, zinc, selenium, and more. Bone marrow provides selenium, a mineral vital for thyroid health; selenium supports thyroid hormone production and antioxidant protection in the thyroid gland, and is essential for converting thyroid hormone T4 into T3.
The mechanistic understanding of bone marrow as an ingested food or supplement derives almost entirely from studies of its individual constituent compounds in isolation, not from studies of whole marrow intake. No established mechanism has been verified specifically for the consumption of whole bone marrow as a supplement in clinical studies.
The adipocyte-derived hormone adiponectin mediates beneficial cardiometabolic effects, and hypoadiponectinemia is a biomarker for increased metabolic and cardiovascular risk; circulating adiponectin decreases in obesity and insulin resistance, likely because of impaired production from white adipose tissue. Research has established bone marrow adipose tissue as a potential source of circulating adiponectin: Cawthorn et al. reported that in mice and rabbits, adiponectin expression and secretion is higher in marrow adipose tissue compared to peripheral adipose tissue depots; the same authors demonstrated that mice with higher MAT due to calorie restriction had greater serum levels of adiponectin. However, this mechanism pertains to the marrow within living organisms, not to the consumption of marrow from animals. Whether consuming dietary marrow meaningfully affects circulating adiponectin levels in humans has not been directly tested.
Native and hydrolyzed collagen are the most studied collagen types for joint health; native collagen has a specific immune-mediated mechanism that requires the recognition of its epitopes to inhibit inflammation and tissue catabolism at articular level, while hydrolyzed collagen may contain biologically active peptides that are able to reach joint tissues and exert chondroprotective effects.
Research on collagen peptide bioavailability has demonstrated that these molecules are absorbed intact to a meaningful degree. Collagen hydrolysates have been shown to provide multiple health benefits, which have been primarily attributed to their bioactive peptide content; the bioactive peptides released after digestion of collagen products, such as Pro-Hyp and Gly-Pro-Hyp, can possess multiple health properties including antimicrobial and antihypertensive effects, regulating inflammation, reducing pain associated with osteoarthritis, promoting bone synthesis, stimulating wound healing, as well as antioxidant properties. Small molecular weight collagen peptides (<1 kDa) are more readily absorbed by the intestinal tract, and their bioavailability in the blood is significantly higher than that of large molecular peptides; such small molecule peptides enter cells through rapid penetration, effectively participating in various physiological processes such as promoting osteoblast differentiation and inhibiting osteoclast activity.
A specific collagen-derived mechanism relevant to bone has also been described: a specific collagen peptide (Asp-Gly-Glu-Ala) initiates bone marrow cell differentiation into osteoblasts by interacting with the Ξ±2Ξ²1 integrin receptor on cell membranes; it also stimulates osteoblast differentiation, bone matrix formation, and osteogenic markers by activating ERK/MAPK signaling pathways; it can induce IGF-1 production, which activates a calcium-sensing receptor and exerts an anabolic effect on bone; and it can affect osteoclasts by increasing the OPG/RANKL ratio, potentially reducing bone resorption.
Data from a number of studies and trials have shown that different conjugated linoleic acids (CLAs) may produce beneficial effects on cancer, atherosclerosis, hypertension, diabetes, and changes in body composition; despite the increasing knowledge about CLA's implications on health, the mechanism of action of these fatty acids is not completely understood; moreover, human studies indicate that some of these beneficial effects are considerably less evident than anticipated from mice studies, while the efficacy and safety of dietary supplements containing CLA have been questioned in some intervention trials.
Adipokines secreted from white adipose tissue and bone marrow adipose tissue exert endocrine and paracrine effects on the survival and function of osteoblasts and osteoclasts; an increase in marrow fat is implicated in osteoporosis, and hence it is crucial to understand the complex interplay between adipocytes and bone. Recent studies have demonstrated that adipokines can influence skeletal system repair and regeneration by modulating bone marrow-derived mesenchymal stem cell (BMSC) proliferation, differentiation, migration, and immunomodulatory functions. Again, these mechanisms describe the behavior of marrow within the body, not the effects of dietary marrow consumption.
A fundamental limitation applies across all health areas discussed below: no studies directly evaluate the effects of consuming bone marrow as a food or supplement; available research concerns the individual components of bone marrow, in particular collagen, glycine, glucosamine, and conjugated linoleic acid. Evidence strength for each health area therefore reflects research on isolated constituents, not on bone marrow supplementation itself.
This is the area with the most substantial associated constituent-level evidence, primarily from studies of collagen peptides and glucosamine/chondroitin supplements.
Collagen peptides for joint health: A 2024 systematic review published in Orthopedic Reviews screened 4,246 articles and included 36 RCTs evaluating oral Type I hydrolyzed collagen supplementation. Studies focused on bone health faced limitations that prevent definitive conclusions about the effects of collagen supplementation; in contrast, studies on joint health reported beneficial outcomes such as pain reduction, improvements in clinical parameters, increased physical mobility, and enhanced ankle function. A commonly cited individual study found that in one 6-month study in 147 athletes, supplementing with 10 grams of collagen per day significantly decreased activity-related joint pain.
Glucosamine and chondroitin: The clinical evidence for supplemental glucosamine and chondroitin in osteoarthritis is mixed β some trials show modest benefit in pain reduction, others do not; dietary intake through marrow and similar foods provides smaller amounts than are used in clinical trials. This second point is important: the doses of glucosamine and chondroitin used in positive clinical trials typically far exceed the amounts that could plausibly be obtained from whole bone marrow consumption.
Evidence strength: Moderate for collagen hydrolysate supplementation (10g/day) on activity-related joint pain, based on multiple RCTs; mixed and insufficient for bone marrow itself as a joint supplement.
Collagen peptides and bone mineral density: Research on specific collagen peptides has shown preliminary evidence in the context of bone health. Specific collagen peptides are easily absorbed from the GI tract and, via the circulatory system, reach the bone marrow, where they activate the formation of osteoblasts from bone marrow stem cells and inhibit the activity of osteoclasts; specific collagen peptides demonstrated enhancements in bone mineral density of 4.2% in the spine and 7.7% in the femoral neck, coupled with alterations in bone turnover markers at 12 months; a clinically relevant increase in BMD was observed in a 4-year follow-up study. These findings pertain to purified specific collagen peptide supplementation, not to whole bone marrow.
Bone marrow as a whole: Bone marrow is not a treatment for osteoporosis and should not be presented as one; population studies do not identify regular bone marrow consumption as a protective factor against fracture or as a meaningful modifier of bone mineral density. Bone marrow provides glycine, proline, and other nutrients relevant to collagen synthesis and musculoskeletal maintenance; however, population studies do not identify it as a protective factor against osteoporosis, and it is not a treatment for established bone loss.
Evidence strength: Preliminary to moderate for isolated collagen peptide supplementation on BMD in specific studied populations; insufficient / absent for whole bone marrow supplementation on bone health outcomes.
CLA and inflammatory markers in humans: A systematic review and meta-analysis published on PubMed (PMID 29288248) examining randomized controlled trials assessed the effects of CLA supplementation on circulating inflammatory markers. Numerous studies have been conducted on the inflammation-lowering effects of CLA in in vitro and animal models; however, the effects of CLA treatment on inflammatory markers in humans are controversial; this meta-analysis showed that CLA supplementation may increase inflammatory markers (CRP and TNF-Ξ±), raising concerns about using CLA supplementation as an anti-obesity agent among the obese population for at least a short duration.
A separate 2023 GRADE-assessed systematic review and dose-response meta-analysis (PMC9992184) identified 42 studies enrolling 1,109 participants examining CLA effects on inflammatory cytokines and adipokines. Many studies have investigated the effect of CLA supplementation on inflammatory cytokines and adipokines; however, the results of these studies are not consistent.
After analyzing the few studies published to date in reduced samples of healthy humans or patients with overweight, obesity, metabolic syndrome, or diabetes, there is not enough evidence to show that conjugated linoleic acid has an effect on weight and body composition in humans; furthermore, some of these studies have observed that the administration of various CLA isomers has adverse effects on lipid profile, including decreases in HDL cholesterol.
Evidence strength: Weak and inconsistent for anti-inflammatory effects in humans; the evidence from meta-analyses of RCTs for CLA supplementation is actually potentially adverse in some populations, and in vitro / animal findings do not translate reliably to human outcomes.
Adiponectin has been the most studied of the adipokines secreted from marrow adipose tissue; it regulates insulin sensitivity and energy metabolism; adiponectin concentration is lower in obese individuals but increases during energy deficit, indicating that marrow adipocytes may become a significant source of adiponectin during caloric restriction. Adiponectin is an adipokine involved in various metabolic processes including whole-body energy homeostasis and glucose metabolism; it exerts diverse systemic effects on vascular function, insulin sensitivity, and anti-inflammatory responses; however, this hormone might be a negative regulator of bone metabolism, because it is inversely correlated with bone mineral density.
These findings describe the physiology of endogenous marrow adipose tissue in living organisms. Whether dietary consumption of bone marrow from animals influences circulating adiponectin in humans has not been tested in clinical studies.
Evidence strength: Animal/mechanistic only for dietary bone marrow and metabolic effects. No relevant human clinical trials identified.
Some proponents suggest that the glycine and collagen content of bone marrow may support gut lining integrity. Glycine has demonstrated intestinal protective effects in preclinical models, and collagen peptides have been studied for mucosal effects. However, the evidence base for bone marrow supplements specifically β as distinct from collagen peptide supplements or individual amino acid supplementation β is limited. No direct human clinical trials of bone marrow supplementation for gut health have been identified in the peer-reviewed literature.
Evidence strength: Theoretical / constituent-based only. No clinical evidence specifically for bone marrow supplementation and gastrointestinal outcomes.
Within living organisms, bone marrow is the primary site of blood cell production; this is a well-established physiological fact. However, the idea that consuming dietary bone marrow from animals would enhance the hematopoietic capacity of one's own bone marrow is not supported by any clinical evidence. The hematopoietic cells within consumed marrow are denatured during digestion. No peer-reviewed human studies have established that dietary bone marrow intake improves red blood cell production, hemoglobin levels, or related hematological parameters.
Evidence strength: No clinical evidence. The physiological role of marrow in the body is well understood; there is no evidence this translates to benefit from dietary consumption.
While research is limited on the health benefits of bone marrow itself, the compounds it contains β including collagen, conjugated linoleic acid, glycine, and glucosamine β have been linked to decreased inflammation, better skin health, and improved joint function. Evidence for skin benefits derives entirely from collagen supplementation studies (particularly hydrolyzed collagen peptides), not from bone marrow supplementation studies.
Evidence strength: Indirect / constituent-based only. Studies of hydrolyzed collagen on skin elasticity and hydration exist but are not attributable specifically to bone marrow supplementation.
There is no established or consensus clinical dosage for bone marrow as a supplement, because no clinical trials have been conducted specifically on bone marrow supplement products. Dosages reported in studies cited below pertain to isolated constituent compounds, not to whole bone marrow.
Bone marrow is high in both cholesterol and saturated fat; for most healthy adults, occasional consumption is unlikely to have a meaningful impact on cardiovascular risk, as dietary cholesterol affects serum LDL less significantly than total saturated fat intake; however, patients with hyperlipidaemia, familial hypercholesterolaemia, or established cardiovascular disease should discuss frequency of intake with their GP or cardiologist before making it a dietary staple. Current evidence suggests that for the majority of healthy adults, dietary cholesterol has a smaller effect on serum LDL cholesterol than the saturated fat content of the diet as a whole; the effect is also highly individual β some people are cholesterol hyper-responders and others are not.
Compared to lean proteins, bone marrow is richer in fat and calories, making it more of an occasional nutrient-dense food rather than a daily health staple; overconsumption may contribute to excessive calorie intake and increased saturated fat levels, which can negatively affect metabolic and heart health.
Bone marrow contains purines, which can raise uric acid levels; high uric acid levels can lead to gout, a painful form of arthritis; people with a history of gout should be careful about eating bone marrow.
Bones can accumulate heavy metals like lead and cadmium; while the levels are generally low, regular consumption of bone marrow may lead to gradual accumulation of these metals in the body; choosing animals from trusted sources that prioritize animal welfare and health can help minimize this risk.
Prion diseases such as bovine spongiform encephalopathy (BSE), also known as mad cow disease, can be a concern when consuming animal products. Regulatory agencies in the US, EU, and other jurisdictions have established controls on bovine-derived ingredients (including bone marrow) sold as dietary supplements to reduce BSE risk, including sourcing from countries with negligible or controlled BSE status and exclusion of specified risk materials (SRM). Some commercial supplement products note BSE-free status on their labeling, referencing sourcing from regulated herds.
CLA is present in bone marrow fat; at supplemental doses, CLA has raised safety flags in clinical research. A meta-analysis of RCTs showed that CLA supplementation may increase inflammatory markers (CRP and TNF-Ξ±), raising concerns about its use as an anti-obesity agent among the obese population for at least a short duration. Analysis of available clinical trials found not enough evidence to show that CLA has an effect on weight and body composition in humans; furthermore, some studies observed that administration of various CLA isomers has adverse effects on lipid profile including decreases in HDL cholesterol. The levels of CLA naturally present in dietary bone marrow are far lower than those used in supplementation trials.
Some supplements claim to provide collagen, fats, and micronutrients, but evidence is limited and they are generally less beneficial than whole-food dietary sources. The supplement industry's bone marrow products are not subject to the same pre-market clinical evidence requirements as pharmaceutical drugs. In the United States, these products are regulated as dietary supplements under DSHEA, and health claims made on their labels have not been evaluated by the FDA for efficacy. The statement that these products are "not intended to diagnose, treat, cure, or prevent any disease" is a required legal disclaimer for all U.S. dietary supplements of this type.
The overall scientific evidence base for bone marrow supplementation as a distinct intervention is characterized by a fundamental gap: though no studies directly evaluate the effects of consuming bone marrow, plenty of research on the health benefits of its components is available. Individual constituents β particularly hydrolyzed collagen peptides and glucosamine/chondroitin β have been studied in randomized controlled trials with mixed-to-moderate evidence for joint health effects at specific doses. The mechanisms by which bone marrow adipose tissue and its adipokines influence metabolic and bone health in living organisms are well characterized in animal and mechanistic research but have not been translated into studies of dietary bone marrow consumption. Claims that consuming bone marrow directly "feeds" one's own bone marrow or improves hematopoiesis have no evidentiary basis. Bone marrow is nutritionally interesting; it is not a treatment for osteoporosis and should not be presented as one.
Health conditions that Bone marrow may help support.
Body systems that Bone marrow may help support.
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