Beef liver is one of the most nutrient-dense foods in the human diet, packed with extraordinarily high levels of vitamin A, vitamin B12, copper, B vitamins, iron, and several other essential nutrients. A single 3-ounce serving delivers over 700% of the daily value for vitamin A and nearly 4,000% of the daily value for vitamin B12. No common cut of meat comes close to matching these concentrations.
Key Nutrients in Beef Liver
The standout nutrients in beef liver, per 100 grams of raw liver, include:
- Vitamin A: 23,220 mcg RAE, or roughly 2,580% of the daily value
- Vitamin B12: 200 mcg, thousands of percent above what your body needs daily
- Copper: 4.1 mg, well over 400% of the daily value
- Riboflavin (B2): 2.8 mg, about 215% of the daily value
Beyond these headline numbers, beef liver is also rich in folate, niacin (B3), pantothenic acid (B5), vitamin B6, choline, iron, zinc, and phosphorus. It’s high in protein and relatively low in fat compared to most cuts of beef. A 200-calorie portion of pan-fried beef liver contains about 30 grams of protein and just over 5 grams of fat.
How It Compares to Regular Beef
The gap between liver and a typical steak is dramatic. Calorie for calorie, a 200-calorie serving of pan-fried beef liver delivers 8,850 mcg of vitamin A. The same caloric amount of grilled skirt steak delivers 2.2 mcg. That’s a difference of roughly 4,000 to 1. For copper, the contrast is similarly extreme: liver provides about 16.7 mg per 200-calorie serving (over 1,800% of the daily value), while steak provides 0.16 mg.
The B vitamin differences are just as striking. That same serving of liver contains 95 mcg of B12 versus 5.6 mcg in steak, and 297 mcg of folate compared to just 5 mcg. Liver also delivers nearly 478 mg of choline, a nutrient important for brain health that most people don’t get enough of, versus 58 mg in steak. Even for iron, liver edges out steak: 7.1 mg versus 4.1 mg per 200-calorie serving.
Where steak “wins” is in having less cholesterol (74 mg versus 435 mg) and no carbohydrates. Liver contains a small amount of carbohydrate, about 6 grams per serving, because the organ stores glycogen.
What These Nutrients Do for You
Vitamin A supports vision, immune function, and cell growth. Getting adequate amounts has been linked to a lower risk of conditions like cataracts. The form of vitamin A in liver is preformed retinol, which your body can use immediately without needing to convert it from plant-based precursors like beta-carotene.
Vitamin B12 is critical for your nervous system and for making red blood cells. When B12 levels drop too low, people feel persistently tired, have trouble with memory and focus, and can experience mood changes including depression and irritability. Because liver contains such an enormous amount, even occasional servings can help maintain healthy B12 stores, which is especially relevant for people who don’t eat much meat otherwise.
Iron from liver is in the heme form, meaning your body absorbs it much more efficiently than the iron found in plant foods. Low iron leads to anemia, which causes fatigue, muscle weakness, and difficulty concentrating. Copper works alongside iron in forming red blood cells and also supports your immune system and connective tissue. Choline plays a role in liver function, brain development, and muscle movement.
How Much Is Safe to Eat
The very thing that makes beef liver exceptional, its nutrient density, is also what limits how much you should eat. The main concerns are vitamin A and copper.
A single 3-ounce serving of pan-fried beef liver contains about 6,582 mcg of vitamin A, which is 731% of the daily value. The daily value is set at 900 mcg for adults. Your body stores excess vitamin A in the liver (your own liver, that is), and chronically high intake can cause a condition called hypervitaminosis A, with symptoms ranging from headaches and nausea to more serious liver damage over time.
Copper follows a similar pattern. The tolerable upper intake level for adults is 10,000 mcg (10 mg) per day. A 100-gram portion of raw liver contains 4.1 mg of copper, and cooking concentrates nutrients slightly, so a generous serving could push you close to that ceiling. Chronic excess copper intake can cause abdominal pain, cramps, nausea, diarrhea, and eventually liver damage. People with Wilson’s disease, a genetic condition that impairs copper clearance, should avoid liver entirely.
General guidance suggests keeping beef liver consumption in the range of 100 to 250 grams per week, depending on your age and sex. That works out to roughly one to two modest servings. Eating liver once a week is a common and practical approach that captures the nutritional benefits without pushing vitamin A or copper into risky territory.
Pregnancy and Vitamin A Risk
Pregnant women are advised to avoid liver and liver products. The NHS lists liver explicitly among foods to avoid during pregnancy because the high levels of preformed vitamin A can harm a developing baby. This applies to all forms of liver, including pâté and liver sausage, as well as high-dose supplements containing vitamin A. The risk is specific to preformed retinol, not the beta-carotene found in carrots and sweet potatoes.