A Guide to Beef Organ Supplements: The Science Behind Beef Liver, Adrenal, and Thyroid Extracts

Introduction
One hundred years ago, animal organs were among the most prized parts of the human diet. Hunters ate livers, kidneys, and hearts; herders consumed animal blood and glands; and traditional medicine used organs as tonics.
But by the mid-20th century, chicken and ground beef had become mainstream, and “animal organs” had all but disappeared from the American diet. As a result, modern people are generally deficient in nutrients found exclusively in organs—such as vitamin A (in the form of retinol), vitamin B12, heme iron, CoQ10, choline, copper, and zinc.
Since 2020, beef organ supplements have experienced a resurgence—particularly whole-organ powders that are “grass-fed,” “pasture-raised,” and “freeze-dried.”
This article will introduce you to this ancient yet emerging category of supplements.

1. Why Is “Meat Not the Same as Organs”?
A common misconception is: “I eat meat every day, so my nutrition should be sufficient.”
But the reality is:
Nutrient    Muscle Meat (Beef)    Liver
Vitamin A    Almost none    Extremely high (10,000–20,000 IU/100g)
Vitamin B12    High    Extremely high
Iron    Moderate    Extremely high (heme iron)
Copper    Low    Extremely high
Choline    Low    Extremely high
CoQ10    Moderate    High
Vitamin D    Low    Moderate
The nutrient density of organ meats is 10–50 times that of muscle meat. This is why traditional societies have regarded organs as “the most precious parts.”

2. Beef Liver: The King of Nutrient Density
2.1 The “Superpowers” of Beef Liver
Beef liver is one of the most nutrient-dense foods. Every 100 grams of raw beef liver (about 3.5 ounces) contains:
**Vitamin A**: 20,000 IU (in the form of retinol, with extremely high bioavailability)
**Vitamin B12**: 70–80 µg (about 2,500% of the RDA)
**Folate**: 200–250 µg
**Iron**: 6–8 mg (heme iron, with an absorption rate of 25–30%, which is 5 times that of plant-based iron)
**Copper**: 10–15 mg
**Choline**: 300–400 mg
**CoQ10**: 3–5 mg
**Biotin**: 40 µg
2.2 Key Benefits
1. Improves Iron-Deficiency Anemia
Heme iron is the form of iron most easily absorbed by the human body. For women (especially those with heavy menstrual flow), athletes, and vegetarians or vegans transitioning to a meat-based diet, beef liver is the best food for correcting iron deficiency.
2. Boosts Energy and Athletic Performance
B12 + Iron + CoQ10 + Choline = The golden combination for energy metabolism.
3. Skin and Vision
Vitamin A (retinol) is essential for skin cell renewal and retinal function. It helps with dry skin, night blindness, and acne.
4. Supporting Liver Health
The ancient wisdom of the “Doctrine of Signatures”: eating animal liver is believed to support the human liver. Modern science confirms this—beef liver is rich in choline (which supports liver fat metabolism), CoQ10 (for mitochondria), and glutathione (the liver’s most abundant antioxidant).
2.3 Risks of Beef Liver: Vitamin A Overdose
⚠️ Key Warning: Vitamin A is a fat-soluble vitamin that accumulates in the body; excessive amounts are toxic.
Daily Upper Limits for Adults:
 Adult RDA: 3,000 IU (900 µg RE)
 Acute toxicity: >200,000 IU in a single dose
 Chronic toxicity: >10,000 IU/day for several months
For pregnant women: Vitamin A intake exceeding 10,000 IU/day may cause birth defects.
Therefore:
 Consume beef liver no more than 1–2 times per week, 100–150 g per serving.
 When choosing supplements, limit the daily dose of vitamin A to 3,000–5,000 IU.
 **Pregnant women should avoid beef liver supplements.**

3. Beef Heart: CoQ10 and the Heart
3.1 The Unique Value of Beef Heart
**CoQ10**: High concentration (5–10 mg/100 g)
**Taurine**: High concentration (supports heart muscle)
**Carnosine**: High concentration
**Iron, B12**: Equivalent to liver
**Potassium, Magnesium**: High
3.2 Benefits
1. Cardiovascular Support
CoQ10 is a key component of the mitochondria in cardiac muscle cells. Supplementation