How Much Beef Liver Per Day? The Vitamin A Math

By USDA and NIH figures, cooked beef liver reaches the adult upper limit for preformed vitamin A at about 39 grams a day — 1.4 ounces — with nothing else counted. One 3-ounce serving a week averages out to about a third of that limit per day.

This page is a satellite of our complete guide to beef organ supplements for women. It answers the liver question in grams, from USDA and NIH figures, and says where the answer runs out.

How much vitamin A is in beef liver?

Raw beef liver carries about 4,970 mcg RAE of preformed vitamin A per 100 grams in USDA data, and pan-fried liver about 7,740 mcg, because cooking drives off water. A 3-ounce cooked serving is roughly 6,600 mcg — more than nine times the 700 mcg a day recommended for adult women, and over twice the 3,000 mcg upper limit.

The figures are from the USDA FoodData Central entry for raw beef liver (SR Legacy 169451) and its pan-fried counterpart (168627). Liver’s vitamin A is almost entirely retinol — 4,950 of the 4,970 mcg — the preformed kind the body stores, which is why a ceiling exists. The NIH Office of Dietary Supplements sets the RDA for women aged 19 and over at 700 mcg RAE a day, 770 mcg in pregnancy and 1,300 mcg when breastfeeding, and the tolerable upper intake for preformed vitamin A at 3,000 mcg a day for adults, food and supplements combined. What else liver carries is in beef liver benefits for women.

Why the number moves from one animal to the next

The USDA average rests on four raw samples whose retinol ranged from 2,530 to 8,710 mcg per 100 grams — a 3.4-fold spread. Every gram figure here uses the average; the liver on your plate could carry half as much or nearly twice as much.

How much beef liver per day stays under the vitamin A upper limit?

About 39 grams of cooked beef liver, or 60 grams raw, delivers 3,000 mcg RAE — the NIH tolerable upper intake for adults — from liver alone. One ounce of cooked liver a day, the amount daily-liver advocates usually cite, comes to about 2,200 mcg: three times the RDA and 73 percent of the ceiling, before any other source is counted.

Nine grams of cooked liver already covers the RDA. The ceiling is a total, not a liver allowance: retinol in a multivitamin, cod liver oil, eggs and dairy counts toward the same 3,000 mcg, so 39 grams assumes liver is the only source, which it never is. Raw and cooked differ because liver loses roughly a quarter to a third of its weight in the pan while its vitamin A stays; most recipes weigh raw. For girls aged 14 to 18 the upper limit is 2,800 mcg.

Is it better to eat liver once a week than a little every day?

On average the two can match: 3 ounces of cooked liver once a week works out to about 940 mcg RAE a day, and 1 ounce every day to about 2,200 mcg. The difference is the peak — the weekly serving delivers 6,600 mcg in one sitting, more than twice the daily upper limit, while the daily ounce never crosses it. Two 4-ounce servings a week average about 2,500 mcg; three push past the limit.

The intake tables do not settle which pattern is safer. The upper limit is written per day and the NIH publishes no weekly version; dividing a serving by seven is a convention, not an official allowance. The fact sheet does say that acute toxicity follows one or a few doses of roughly 100 times the RDA — about 70,000 mcg for a woman, more than ten 3-ounce servings at once — so one serving is nowhere near an acute dose.

What the upper limit is, and is not

A 2006 review in the American Journal of Clinical Nutrition (PubMed 16469975) makes the quieter point: preformed vitamin A intake in developed countries often exceeds the RDA, and the body stores the surplus. Read that way, the sensible target for a liver habit is an average near the RDA, not the ceiling — one 3-ounce serving a week, or an ounce every second or third day.

Does beef liver have too much copper?

It can. Pan-fried beef liver carries about 14.6 mg of copper per 100 grams, so a 3-ounce serving is 12.4 mg — above the 10 mg adult upper limit set by the NIH and nearly fourteen times the 900 mcg RDA. Copper reaches its ceiling at about 68 grams of cooked liver a day; vitamin A reaches its ceiling first, at 39.

The NIH copper fact sheet lists 3 ounces of pan-fried beef liver at 12,400 mcg in its own food table, against an upper limit of 10,000 mcg for adults, pregnancy and lactation included. On a raw basis — 9.76 mg per 100 grams — the copper ceiling sits at about 102 grams a day. Because vitamin A hits its limit at a smaller portion on either basis, anyone under the vitamin A limit is under the copper limit by default. Who should think twice about organ meats for other reasons is in beef organ supplement side effects.

How much beef liver per day when pregnant?

The NIH advises women who are or might be pregnant not to exceed 3,000 mcg RAE of preformed vitamin A a day — the same upper limit as for other adults — against a pregnancy RDA of 770 mcg. A single 3-ounce serving of cooked liver carries more than twice that limit, which is why prenatal guidance singles liver out. What to do with that is a question for your physician.

The research on liver itself is thin and divided. A 2001 trial in the Journal of Nutrition (van Vliet and colleagues, PubMed 11739865) gave 35 women 3, 7.5 or 15 mg of vitamin A as liver paste or as a supplement: absorption was the same, but the retinoic acid metabolites — the forms that matter in early pregnancy — ran higher after the liver paste, and the authors concluded that pregnant women should limit liver products. A 1994 study in Human and Experimental Toxicology (Buss and colleagues, PubMed 8198828) gave ten women 50 or 150 mg of retinol as fried calf liver or as a supplement and found the opposite: peak all-trans-retinoic acid up to 20 times higher after the supplement. Two small studies, two conclusions; neither disputes the ceiling, which a 3-ounce serving clears in one meal. Whether a two-capsule organ supplement belongs in that conversation is in can you take beef organ supplements while pregnant.

How does a liver capsule compare with eating liver?

A capsule is a small fraction of a serving. Raw liver is 70.8 percent water, so a 500 mg capsule of freeze-dried liver began as about 1.7 grams of fresh tissue — roughly 85 mcg RAE by USDA arithmetic — and a six-capsule, all-liver serving of 3,000 mg as about 10 grams, or roughly 510 mcg: a sixth of the upper limit. That is a thirteenth of a 3-ounce serving.

Those estimates assume freeze-drying loses no vitamin A, the most generous assumption available, and an average animal; on the USDA sample range the 3,000 mg serving could carry about 260 to 895 mcg. A capsule is not a way around the ceiling if you also eat liver: the amounts stack. Our own formula, Women Bloom, carries 150 mg of freeze-dried liver in a two-capsule serving beside four other organs, as printed on our Supplement Facts page. That panel does not declare vitamin A and no finished-product assay exists, so we print no figure for it. Why our serving is two capsules and 600 mg of organ rather than six and 3,000 is in beef organ supplement dosage; the current lot’s certificate is on the Lab Tests page.

The short version

How much beef liver per day comes down to preformed vitamin A. Cooked liver reaches the adult upper limit of 3,000 mcg RAE at about 39 grams a day, raw liver at about 60; 9 grams of cooked liver covers the 700 mcg RDA for women. One 3-ounce serving a week averages about 940 mcg a day, an ounce every day about 2,200; aim near the RDA, not the ceiling. Copper sets a second ceiling at about 68 grams cooked. In pregnancy the limit is the same and the studies disagree — ask your physician. Capsules are food fractions that stack with what you eat. Women Bloom carries 150 mg of liver in a two-capsule serving of five New Zealand grass-fed organs, with no vitamin A figure on the panel — and we would rather say so than guess.*

Last reviewed: 14 September 2026. Nutrient data from USDA FoodData Central, SR Legacy entries 169451 (beef liver, raw) and 168627 (beef liver, pan-fried); intake values from the NIH Office of Dietary Supplements fact sheets on vitamin A and copper; all read 14 September 2026. Ounce conversions use 28.35 grams. This article is general information, not medical advice. Talk to your physician or a registered dietitian before changing what you eat or starting any supplement, particularly if you are pregnant, planning a pregnancy, take prescription medication or have blood tests scheduled.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.