For most of human history, organ meats weren't a niche health food. They were the prize.
When hunters brought down an animal, the organs were eaten first — liver, heart, kidney, brain. The muscle meat came later. Across cultures and continents, the most prized parts of the animal were the ones we now discard or feed to pets.
Somewhere in the last century, that changed. Muscle meat became the default. Organs disappeared from most Western diets — and with them, one of the densest concentrations of nutrition available in any food.
Here's what you're missing, and why it matters.
Liver: Nature's Multivitamin
Liver is, without qualification, the most nutrient-dense food on earth. Gram for gram, nothing else comes close.
A 100g serving of beef liver contains:
- Vitamin B12: over 3,000% of the recommended daily intake
- Vitamin A (retinol): over 600% RDI — the pre-formed, bioavailable form your body can use immediately
- Folate: over 60% RDI — the natural form, far more bioavailable than synthetic folic acid
- Iron (haem): highly bioavailable, absorbed at roughly 2–3x the rate of plant-based iron
- Zinc: over 80% RDI
- Copper: over 700% RDI — one of the most copper-rich foods in existence
- Riboflavin (B2): over 200% RDI
- Selenium, phosphorus, CoQ10
All of this in a food that also provides complete protein, all essential amino acids, and meaningful amounts of omega-3 fatty acids.
No supplement stack replicates this. No plant food comes close. Liver is genuinely in a category of its own.
A Note on Vitamin A
You'll sometimes see caution around liver and vitamin A. The concern is valid: vitamin A toxicity (hypervitaminosis A) is possible with excessive, chronic intake of pre-formed retinol. But the dosing required to reach toxicity is very high and requires sustained, excessive consumption.
For most people, eating liver once or twice a week (roughly 100–150g per serving) is well within safe limits and profoundly beneficial. Pregnant women are advised to limit intake to 100g per week due to higher sensitivity — which is not a reason to avoid it entirely, just to be mindful of portion sizes.
Heart: The CoQ10 Powerhouse
Heart muscle is technically a muscle meat, which means it has a more familiar texture and flavour profile than liver. It's also one of the richest dietary sources of coenzyme Q10 (CoQ10) — a compound critical for cellular energy production and cardiovascular function.
CoQ10 is found in every cell in the body. It's central to mitochondrial function — the process by which your cells generate ATP (energy). Levels decline with age and are depleted by certain medications (statins notably).
Heart is also rich in:
- B vitamins (particularly B12 and folate)
- Iron and zinc
- Selenium
- Complete protein with a full essential amino acid profile
The flavour of beef heart is milder than liver — closer to regular beef — which makes it a more accessible entry point for organ meat beginners.
Kidney: The Overlooked One
Kidney sits in the shadow of liver in most discussions about organ meats, but it earns its place on the list.
Beef kidney is high in:
- B12 — comparable to liver
- Riboflavin (B2) — important for energy metabolism and antioxidant function
- Selenium — a powerful antioxidant mineral
- Iron and zinc
- DAO enzyme — diamine oxidase, which plays a role in histamine metabolism (relevant for people with histamine sensitivity)
The flavour is stronger than heart and more distinctive than liver — it's an acquired taste for many. Which is precisely why it appears in organ complex supplements: the nutritional value without requiring you to cook it.
Why Did We Stop Eating Them?
The decline of organ meat consumption in modern Western diets tracks closely with industrialisation and the rise of processed food culture.
Several factors converged:
Industrialisation of meat production made muscle cuts cheap and abundant. When beef was scarce and expensive, the whole animal was valued. When it became a commodity, the "premium" cuts got elevated and everything else got marginalised.
Texture and flavour aversion — organs have stronger, more complex flavours than muscle meat. Without cultural transmission of how to prepare and cook them, successive generations lost familiarity.
Nutritional miseducation — the fat and cholesterol in organ meats got caught in the crossfire of mid-20th century dietary advice that demonised animal fats broadly. That advice has since been substantially revised, but the cultural residue remains.
Visual disconnection from food — modern consumers increasingly prefer food that doesn't look like it came from an animal. Organs are an obvious casualty of this.
The Ancestral Case
Traditional diets around the world — from Filipino ancestral cuisine to the eating patterns of the Masai, Inuit, and European peasant cultures — treated the whole animal as food. Liver was cooked fresh after a kill. Heart was slow-cooked in stews. Bone marrow was extracted and eaten. Nothing was wasted.
These weren't primitive practices to be overcome. They were nutritionally sophisticated responses to the reality that the most valuable nutrients in an animal are concentrated in its organs, not its muscles.
The ancestral wisdom and the modern nutrition science say the same thing. Eat the organs.
How to Actually Eat Them
The simplest approaches for organ meat beginners:
Liver: Slice thin, cook briefly in butter or ghee with onions. Overcooking is the most common mistake — it should be just cooked through, not grey all the way. Soaking in milk for 30 minutes before cooking reduces the intensity of flavour.
Heart: Slice or cube and cook like steak. Marinate in garlic, herbs, and acid (lemon or vinegar). Works well in stir-fries and stews.
Kidney: Best in slow-cooked dishes (steak and kidney pie/stew). Slice, remove the white core, and cook slowly. The flavour mellows significantly with slow cooking.
The supplement route: If you're not ready to cook organs directly, a whole food supplement that includes a beef organ complex — liver, heart, kidney — delivers the nutritional payload without the cooking. Look for products that use freeze-dried or minimally processed organ concentrate to preserve the co-factors.
The Bottom Line
Organ meats aren't a trend. They're the most nutritionally complete foods available — used by every traditional culture that had access to animals, discarded by modern food culture for reasons that have nothing to do with nutrition.
Liver once a week delivers more bioavailable vitamins and minerals than most supplement stacks. Heart and kidney fill in the gaps.
If there's one dietary shift that would have the most impact on most people's nutrient density — this is it.
Otherside Nutrition includes a grass-fed beef organ complex (liver, heart, kidney) in every batch of our wholefood protein. Learn more at othersidenutritionph.com.
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