Long before protein powders, omega-3 capsules, or fat-soluble vitamin supplements existed, our ancestors were doing something remarkable: they were cracking bones open with stones to get at the soft, fatty tissue inside. Bone marrow was not a byproduct or an afterthought. Archaeological evidence suggests it was a primary target. Understanding why requires looking at what marrow actually contains, and what that means for how the human body was designed to function.
What Archaeology Tells Us About Marrow as a Priority Food
The deliberate extraction of bone marrow is one of the oldest documented human behaviors. Researchers at the Institute of Human Origins and various paleoanthropological sites across Africa and the Levant have identified cut marks and percussion fractures on animal bones dating back over 400,000 years. These are not the marks of scavenging. They are systematic, intentional, and consistent with marrow extraction as a planned activity. A 2018 study published in Science pushed this timeline even further, with researchers from Tel Aviv University identifying marrow storage and delayed consumption at sites in Israel dating to roughly 420,000 years ago.
The nutritional logic is hard to argue with. Marrow is calorie-dense, rich in fat-soluble nutrients, and contains compounds not easily available from muscle meat alone. When a large animal was taken, marrow and organ meats were consumed first. This is well-documented in ethnographic observations of hunter-gatherer and pastoralist populations studied by Weston A. Price in the 1930s. Price observed that traditional peoples who maintained robust physical and dental health prioritized exactly these kinds of rich animal fats, not lean muscle meat, which was often given lower priority or fed to dogs.
The Fat Profile of Bone Marrow: More Than Just Calories
Bone marrow is approximately 50–70% fat, but the composition of that fat matters enormously. Grass-fed beef marrow contains a meaningful proportion of oleic acid, the same monounsaturated fat found in olive oil, along with stearic acid and a range of saturated fats that have been shown in recent research to have neutral or beneficial cardiovascular effects. A 2019 meta-analysis in the American Journal of Clinical Nutrition found no significant association between saturated fat intake and cardiovascular risk when that fat displaces refined carbohydrates in the diet.
Beyond the fatty acid profile, marrow fat is a carrier for fat-soluble vitamins including vitamin A (retinol, not beta-carotene), vitamin D, vitamin E, and vitamin K2. These nutrients require fat for absorption and are critically underrepresented in modern diets. Dr. Paul Saladino, author of The Carnivore Code, has written extensively on the distinction between fat-soluble vitamins found in animal tissue versus plant-derived precursors, noting that retinol from animal sources is immediately bioavailable whereas beta-carotene from plants must be converted, a process that is inefficient in a significant portion of the population due to genetic variation in the BCMO1 gene.
Alkylglycerols: The Most Overlooked Compound in Marrow Fat
Alkylglycerols are a class of ether-linked lipids found in particularly high concentrations in bone marrow, shark liver oil, and human breast milk. They are not widely discussed in mainstream nutrition, but the research on their biological activity is substantial. Swedish researcher Astrid Brohult first identified alkylglycerols in the 1950s while working with leukemia patients who were receiving bone marrow as a nutritional intervention. She observed that patients receiving marrow showed accelerated white blood cell recovery following radiation treatment, which led to decades of subsequent research into the immunological properties of these compounds.
More recent work has examined alkylglycerols in the context of immune function, platelet-activating factor regulation, and their potential role in supporting the body's response to oxidative stress. A review published in Marine Drugs (2010) summarized evidence suggesting alkylglycerols may support macrophage activation and natural killer cell activity. Bone marrow from grass-fed ruminants remains one of the most accessible dietary sources of these compounds in meaningful amounts. This is one of several reasons why Rise Nutrition sources exclusively from grass-fed, pasture-raised cattle from New Zealand and Australia. The fatty acid and alkylglycerol profiles in grass-fed marrow are meaningfully different from grain-fed animals.
Stem Cell Factors and Growth Factors in Marrow: What the Science Suggests
Bone marrow is the primary site of hematopoiesis (the production of red blood cells, white blood cells, and platelets) in adult mammals. It contains a complex matrix of stem cells, stromal cells, and signaling proteins that regulate this process. Among these are colony-stimulating factors, interleukins, and growth factors including stem cell factor (SCF), which plays a central role in the proliferation and differentiation of hematopoietic stem cells. When marrow is consumed as food, these proteins are largely digested, but the question of whether bioactive peptide fragments or lipid-associated signaling molecules survive digestion and exert systemic effects is an active area of research.
Proponents of the ancestral nutrition model, including functional medicine physician Dr. Chris Kresser, have long argued that consuming the tissues you wish to support is a principle embedded in traditional food cultures worldwide. Nose-to-tail advocates point to the documented use of marrow in traditional healing across dozens of cultures (from Mongolian pastoralists to Indigenous communities in Northern Canada) as evidence that empirical observation over millennia preceded and anticipated modern mechanistic understanding. Whether the benefit is primarily from the lipid fraction, the micronutrient content, or bioactive peptides is a question science is still working to fully answer.
Bone Marrow as Brain Food: Fat, Cognition, and the DHA Question
The human brain is approximately 60% fat by dry weight, and the quality of dietary fat consumed over a lifetime has a well-established relationship with cognitive function. Several anthropologists and evolutionary biologists, including Michael Crawford of the Institute of Brain Chemistry and Human Nutrition, have proposed that access to high-quality animal fats (including bone marrow) was a key driver of rapid encephalization in the genus Homo. Crawford's work identifies DHA and arachidonic acid as structural components of neural tissue that must be supplied in adequate amounts for brain development and maintenance.
While bone marrow is not the richest source of DHA compared to fatty fish or fish roe, it contributes a broad spectrum of structural lipids and fat-soluble cofactors that support the metabolic environment in which neurological function operates. The combination of oleic acid, alkylglycerols, vitamin D, and vitamin K2 creates a nutrient matrix that is simply not replicated by any single supplement. This is a key argument made by advocates of whole-food ancestral nutrition: the redundancy and synergy built into foods like marrow is the result of co-evolution, not accident.
Whole Food vs. Isolated Supplement: Why Form Matters
The supplement industry has responded to growing interest in fat-soluble nutrients with isolated forms: standalone vitamin D3 capsules, retinyl palmitate pills, MK-4 or MK-7 vitamin K2 drops. Each of these can address a specific deficiency, and there is good clinical evidence for targeted supplementation in populations with documented deficiencies. Statistics Canada's Canadian Health Measures Survey has identified vitamin D insufficiency in a significant portion of the Canadian population, and targeted supplementation is a reasonable response.
However, isolated nutrients rarely replicate the effect of whole-food sources. The concept of the "food matrix" (how nutrients are packaged within a food and how that packaging affects bioavailability and downstream metabolism) is well-supported in nutrition science. A 2016 review in Advances in Nutrition described how the food matrix significantly modifies nutrient absorption, with whole-food sources frequently outperforming isolated equivalents in absorption trials. This is the case for fat-soluble vitamins, which are more efficiently absorbed when delivered alongside their natural co-factors and in a lipid-rich matrix, exactly as they appear in bone marrow. Rise Nutrition's beef organ supplements are designed around this principle: delivering nutrients in the form closest to how traditional populations consumed them.
Bringing Marrow Back: Practical Ancestral Nutrition
Sourcing and preparing whole bone marrow is possible: roasted marrow bones are served in high-end restaurants and can be found at butchers who work with whole-carcass suppliers. But for most Canadians, eating marrow regularly is impractical. The bones must be sourced from grass-fed animals to get an optimal fatty acid profile, and preparation requires time and kitchen equipment that many people don't use routinely.
This is the gap that a well-sourced organ supplement can fill. When marrow and related organ tissues are freeze-dried at low temperatures and encapsulated without fillers or additives, the lipid profile, fat-soluble vitamins, and bioactive compounds are preserved in a stable, concentrated form. The key is sourcing: grass-fed, pasture-raised cattle from New Zealand and Australia raised without hormones or unnecessary antibiotics, processed without high-heat denaturing that degrades lipid-sensitive compounds. Rise Nutrition was built specifically to meet that standard for Canadian consumers who understand what ancestral nutrition means but need a practical way to integrate it into daily life.
Bone marrow is not a trend. It is one of the most nutrient-dense foods the human body has access to, with a record of human consumption stretching back hundreds of thousands of years. The science supporting its unique lipid profile, alkylglycerol content, and fat-soluble vitamin matrix is real, growing, and consistent with what ancestral food cultures knew empirically long before clinical trials existed. If you are committed to nose-to-tail eating and getting the full spectrum of nutrients your body was designed to use, marrow belongs in your diet.
Rise Nutrition
Grass-Fed Beef Organ Complex
Six ancestral organs: liver, heart, kidney, spleen, pancreas & lung, freeze-dried into one clean grass-fed capsule. Single source. Made in Canada.
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