The best reasons to eat beef organs come down to nutrient density: organ meats are among the most nutrient-rich foods on earth, delivering whole-food vitamin B12, heme iron, preformed vitamin A, copper, and choline in forms the body absorbs well — nutrients that are hard to get from muscle meat alone. Liver leads the pack, but each organ brings something different, which is why our ancestors ate the whole animal.
For most of human history, organ meats were the prize — the parts hunters ate first and traditional cultures reserved for those who needed nourishment most. Then modern eating reduced "meat" to muscle, and the most nutritious parts got left behind. Here are seven honest, evidence-based reasons to put organs back on the menu — plus the caveats most organ cheerleaders skip.
1. Organ meat is the most nutrient-dense food you can eat
Ounce for ounce, few foods rival organ meats for sheer nutrition [1]. Liver alone delivers many times the daily value of vitamin A, B12, and copper in a single serving, along with meaningful folate, choline, riboflavin, and iron. Heart, kidney, and spleen each add their own concentrated nutrients. Compared with muscle meat — which is genuinely good protein but a narrower nutrient source — organs are in a different league. This is the core reason to eat them: more nutrition per bite, in whole-food form, than almost anything else on your plate.
That density is exactly why a nose-to-tail organ supplement exists — to make that nutrition easy to get without sourcing and cooking fresh organs.
A grass-fed, five-organ blend — liver, heart, kidney, spleen, and pancreas — that packs all seven reasons into one third-party-tested capsule.
2. Whole-food vitamin B12 for real energy
Beef liver is the single richest food source of vitamin B12 on the planet, and organs generally are excellent sources [2]. B12 is essential for energy metabolism, healthy red blood cells, and the nervous system — and shortfalls are common, affecting roughly 6% of adults under 60 and up to 20% over 60 [2][3]. When people describe feeling more energetic on organ nutrition, restored B12 (alongside iron) is often the honest reason. It's nutritional support, not a stimulant — but for anyone running low, it matters.
3. Heme iron your body actually absorbs
Organs supply iron in the heme form — the type found only in animal foods, absorbed at roughly 15–35% versus as little as 2–20% for the non-heme iron in plants and iron pills, and with fewer digestive side effects [4]. Liver, kidney, and especially spleen are standout sources. That matters, because iron deficiency is the most common nutritional deficiency in the world [3]. For anyone with higher iron needs — including women of reproductive age and athletes — organs are one of the most efficient food sources of usable iron there is.
4. Preformed vitamin A — no conversion required
Liver provides vitamin A as retinol, the active, ready-to-use form. That's a real advantage over the beta-carotene in vegetables, which your body has to convert to active vitamin A — a process many people carry out inefficiently due to common genetic variation [5]. Vitamin A supports normal vision, immune function, and skin. (Because organs are so rich in it, moderation matters — see the caveats below.)
5. Choline, the nutrient almost everyone misses
Choline is one of the most under-consumed essential nutrients — only about 10% of people meet the recommended intake, and most multivitamins leave it out entirely [6]. It supports liver function, brain and memory, and cell structure. Beef liver is one of the very best food sources. In a real sense, eating liver helps supply the nutrient that keeps your own liver healthy — a quiet, under-appreciated reason organs earn their place.
6. CoQ10, selenium, and nutrients muscle meat can't match
This is the case for eating more than just liver. Different organs concentrate different nutrients:
- Heart is the richest dietary source of CoQ10, central to how cells produce energy — three to four times more than muscle meat [7].
- Kidney is one of the densest food sources of selenium, which supports thyroid function and the body's antioxidant defenses.
- Spleen is one of the richest heme-iron foods of all [4].
A muscle steak gives you none of these in meaningful amounts. A nose-to-tail approach — or a multi-organ blend — is how you capture the full range, which is the whole logic behind eating the different organs together.
7. Ancestral wisdom, honestly updated
Nearly every traditional culture prized organ meats. Weston A. Price's 1930s survey of traditional diets found that organs and animal fats were consistently valued, and reserved for those with the highest nutritional needs — pregnant women, warriors, children [8]. That's observational history, not a controlled trial, and it shouldn't be oversold. But the direction it points — that whole-animal, organ-inclusive eating supported robust health — lines up with what modern nutrition science says about the nutrients organs contain. Old wisdom and new evidence agree here more than they disagree.
The honest caveats
Reasons to eat organs are strong, but honesty means naming the limits:
- Vitamin A moderation. Liver is so rich in preformed vitamin A that daily high doses can add up past the 3,000 mcg RAE (10,000 IU) upper limit over time [9]. Enjoy fresh liver a couple of times a week rather than daily, or use a multi-organ blend, which keeps vitamin A more moderate per serving.
- Pregnancy. Pregnant women should avoid liver and liver supplements because of the vitamin A [10] — a clear exception to the "eat organs" rule.
- Sourcing matters. Because organs process what an animal takes in, choose grass-fed, pasture-raised sources to keep the contaminant load low. Quality is part of the reason, not separate from it.
None of these cancel the case for organs — they just make it an honest one.
Frequently asked questions
Why should you eat organ meat? Because it's the most nutrient-dense food available — a whole-food source of B12, heme iron, preformed vitamin A, copper, and choline in forms the body absorbs well [1][2][4]. Muscle meat is good protein, but organs deliver a far broader range of nutrients per serving.
Is organ meat actually good for you? Yes, in reasonable amounts from a good source. Organs supply nutrients that are hard to get elsewhere and support energy, immunity, and overall nutrition [1][6]. The main caveat is liver's very high vitamin A, which means moderation — and pregnant women should avoid liver [9][10].
Which organ meat is the healthiest? Liver is the single most nutrient-dense — richest in vitamin A, B12, and copper. But heart (CoQ10), kidney (selenium), and spleen (iron) each add nutrients liver is lower in [7], which is why a blend covers the most ground.
How often should you eat organ meat? Because of vitamin A, fresh liver is best kept to about one to two servings a week. Other organs are less vitamin-A-dense. A multi-organ supplement spreads the load and can be taken more regularly at a labeled serving [9].
What if I can't stand the taste of organ meat? That's the number-one barrier, and it's why desiccated organ capsules exist. They deliver most of the nutrition without the flavor or the cooking — a practical way to get the benefits if fresh organs aren't happening in your kitchen.
Are organ supplements as good as eating fresh organs? They retain most of the nutrient profile in a convenient form, which makes them a solid option if you won't eat fresh organs. Fresh has a slight edge on bioavailability, but a quality grass-fed supplement captures the majority of the benefit.
Seven reasons, one honest theme: organs deliver whole-food nutrition that modern muscle-meat eating leaves on the table. Whether you cook them or take a capsule, putting organs back in your diet is one of the higher-leverage moves in nutrition.
Not up for cooking liver and kidney? Beef Organ Complex packs all seven reasons into one grass-fed, five-organ blend — liver, heart, kidney, spleen, and pancreas — third-party tested and filler-free, backed by a 60-day money-back guarantee. Want to start with the king of organs? Our grass-fed Beef Liver delivers 3,000mg a serving. New here? See our complete guide to beef organ supplements.
Sources
- USDA FoodData Central — Beef liver, braised (FDC ID 168626), and organ-meat nutrient profiles. fdc.nal.usda.gov
- Stabler, S.P. (2013). "Vitamin B12 Deficiency." New England Journal of Medicine, 368(2), 149–160. PMID: 23301732
- GBD 2021 Anaemia Collaborators (2023). "Prevalence, years lived with disability, and trends in anaemia burden by severity and cause, 1990–2021." The Lancet Haematology, 10(9), e713–e734. PMID: 37536353
- Gallo Ruelas, M., et al. (2024). "A comparative analysis of heme vs non-heme iron administration: a systematic review and meta-analysis of randomized controlled trials." European Journal of Nutrition, 64(1), 30. PMID: 39708071
- Tang, G. (2010). "Bioconversion of dietary provitamin A carotenoids to vitamin A in humans." American Journal of Clinical Nutrition, 91(5), 1468S–1473S. PMID: 20200262
- Zeisel, S.H., & da Costa, K.A. (2009). "Choline: an essential nutrient for public health." Nutrition Reviews, 67(11), 615–623. PMID: 19906248
- Mattila, P., & Kumpulainen, J. (2001). "Coenzymes Q9 and Q10: Contents in Foods and Dietary Intake." Journal of Food Composition and Analysis, 14(4), 409–417. PMID: 11257723
- Price, W.A. (1939). Nutrition and Physical Degeneration. Paul B. Hoeber/Harper & Brothers.
- NIH Office of Dietary Supplements (2024). "Vitamin A and Carotenoids — Health Professional Fact Sheet" (UL 3,000 mcg RAE / 10,000 IU per day). ods.od.nih.gov
- Rothman, K.J., et al. (1995). "Teratogenicity of high vitamin A intake." New England Journal of Medicine, 333(21), 1369–1373. PMID: 7477116