Beef liver: the vitamin A is both the point and the limit

Start with contamination, because it is the one thing here counted at scale. Ochratoxin A, a mould toxin, showed up in 2 percent of cow liver samples against 39 percent of meat and offal overall, in a meta-analysis of 8,585 mostly European surveillance samples that counted detections rather than amounts. That was the lowest share of any food type in the analysis. The rest of the page turns on one nutrient. The NIH Office of Dietary Supplements puts liver at the top of the preformed vitamin A list, alongside fish, eggs and dairy. The same fact sheet says the body takes up 75 to 100 percent of the retinol in food and usually 10 to 30 percent of beta-carotene, ranges given for the nutrient rather than measured on a cooked portion of liver. The USDA record behind it puts raw beef liver at 4,968 micrograms RAE per 100 g, with five records spreading up to 28,319, so cuts and countries differ more than foods do. A single 100 g portion is already past the 3,000 micrograms RAE a day that experts advise women who are or might be pregnant to stay under, a ceiling written for supplements rather than for dinner.

How much is actually in it

• Liver carries more preformed vitamin A than any other ordinary food, alongside fish, eggs and dairy. — general population, US food supply Evidence E source
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What your body absorbs

• The body takes up 75% to 100% of the retinol in food and usually only 10% to 30% of beta-carotene, which is why liver counts far more toward vitamin A than any vegetable. — general population Evidence E source
  75% to 100% absorption for retinol against 10% to 30% for beta-carotene

What cooking and storage change

• Cooking and heat raise how much beta-carotene the body can get from plants, a step retinol from liver never needs. — general population, plant sources of provitamin A Evidence E source
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What it does to your health

• In 242 Iranian lung cancer cases against 484 matched controls, liver intake stayed a risk factor after adjustment at P = 0.004. — 242 histologically confirmed lung cancer cases and 484 controls matched on age, sex and place of residence, Tehran, 2002 to 2005 (n = 726) Evidence C source
  Liver kept as a risk factor in multivariate analysis at P = 0.004, odds ratios not reported in the abstract
• Among 482 women in Tehran, those in the top quarter for red meat, a category that counted beef liver, had 2.51 times the odds of depressive symptoms against the bottom quarter. — 482 women aged 20 to 50 attending Tehran health centres in 2018, intake by a 168-item food frequency questionnaire (n = 482) Evidence C source
  Odds ratio 2.51 for depressive symptoms, 95% CI 1.32 to 4.76, P = 0.002, plus 1.82 for anxiety and 3.47 for stress, odds rather than risk

Safety, limits and interactions

• Vitamin A is stored rather than flushed out, and acute poisoning can follow one or a few doses of roughly 100 times the RDA. — general population Evidence E source
  Acute toxicity within days to weeks after doses typically above 100 times the RDA, with headache, blurred vision, nausea and coordination problems
• A meta-analysis of 8,585 samples found ochratoxin A in 39% of meat and edible offal overall, and in 2% of cow liver, the lowest share of any food type in the analysis. — 8,585 samples of meat, edible offal and meat products from 75 articles published between 1975 and 2022, mostly European (n = 8585 samples) Evidence C source
  39% overall prevalence, 2% in cow liver against 66% in poultry gizzard, overall concentration 1.789 micrograms per kg
• In a Canadian survey of 316 food samples, Campylobacter jejuni turned up in 4, and one of the 4 was raw beef liver. — 316 samples from Ottawa: 55 raw foods, 126 raw milk samples and 135 ready-to-eat foods, collected over 2 years (n = 316) Evidence C source
  4 of 316 samples positive, of which 1 raw beef liver and 3 raw chicken

What people believe that the data does not support

• After Japan banned raw beef liver in restaurants in 2012, weekly asymptomatic E. coli infections went from 0.45 to 0.51 per million people, with no significant change in level or trend. — national reportable disease data for Japan from January 2008 to December 2017, 32,179 asymptomatic and 21,250 symptomatic infections (n = 53429 reported infections) Evidence C source
  0.45 to 0.51 asymptomatic infections per million per week, trend change 0.002 per million per week, 95% CI -0.03 to 0.04, P = 0.93

Who this works differently for

• Preformed vitamin A above the upper limit can cause congenital birth defects, and experts tell women who are or might be pregnant to stay under 3,000 micrograms RAE a day. — women who are or might be pregnant, and women who are lactating Evidence E source
  Birth defects of the eye, skull, lungs and heart reported above the upper limit, with a 3,000 micrograms RAE daily ceiling advised
• In 96 Indonesian children aged 12 to 23 months, meals fortified with powdered beef liver scored 3.3 to 3.5 out of 5 for liking, and much of the powder still went uneaten because of its smell. — 96 Indonesian children aged 12 to 23 months and their mothers, single test food then a 2-week home trial (n = 96) Evidence B source
  Liking 3.3 to 3.5 on a 5-point scale after 2 weeks at home, no detectable difference from placebo except lower liking for the liver plus meat blend
• Among 150 Pakistani girls aged 11 to 19, of whom 77% were anaemic, beef and liver was the only food group whose intake tracked with haemoglobin level. — 150 adolescent girls aged 11 to 19 in Cherah union council, Islamabad, randomly sampled (n = 150) Evidence C source
  Beef and liver the only food group with a statistically significant association with haemoglobin, effect size not reported

What is still unknown

• In 94 South African preschool children whose excess vitamin A came partly from liver, higher liver stores went with lower height and weight scores and explained 6% to 10% of the variation. — 94 South African children aged 36 to 60 months in a cohort with mandated vitamin A supplementation, fortification and liver consumption (n = 94) Evidence C source
  Total liver vitamin A reserves predicted 6-10% of the variation in height, weight and weight-for-height z scores before supplementation at P < 0.05, rising to 14-19% four weeks after a 200,000 IU dose

The bottom line

Raw liver is the part people argue about. Japan banned it in restaurants in 2012, and weekly asymptomatic E. coli infections went from 0.45 to 0.51 per million people, a trend change of 0.002 per million per week, 95 percent confidence interval -0.03 to 0.04, P = 0.93. This was tested, and the ban did not move the national count. It does not follow that raw liver is safe: people kept eating it at home, and a national restaurant rule is a blunt instrument. In a Canadian survey of 316 samples from Ottawa, Campylobacter jejuni was found in 4, one of which was raw beef liver, a single observation that gives no rate for liver on its own. Two Iranian studies count liver against health outcomes, and both are observational. Among 242 people with confirmed lung cancer and 484 controls matched on age, sex and residence in Tehran, liver stayed a risk factor after adjustment at P = 0.004, with no odds ratio reported and 66.5 percent of cases smoking against 40.3 percent of controls. Among 482 Tehran women aged 20 to 50, the top quarter for red meat had 2.51 times the odds of depressive symptoms against the bottom quarter, 95 percent confidence interval 1.32 to 4.76, with liver folded into one combined red meat score. Those are odds from a single time point, and low mood changing what people eat fits the data as well as the other direction. Where liver looks useful, the studies are small. Among 150 girls aged 11 to 19 near Islamabad, 77 percent of them anaemic, beef and liver was the only food group whose intake tracked with haemoglobin, with no effect size reported and no adjustment described. In 96 Indonesian children aged 12 to 23 months, meals fortified with powdered beef liver scored 3.3 to 3.5 out of 5 for liking after two weeks at home, and much of the powder went uneaten because of its smell. That trial measured whether toddlers would eat it, not what it did to them. The caution worth your attention is the vitamin A itself. It is fat soluble, so the body stores the excess in the liver instead of flushing it out, and repeated portions accumulate in a way that water soluble nutrients do not. Acute poisoning follows one or a few doses above roughly 100 times the RDA, a level the fact sheet describes for supplements and one that liver would reach only in a very large portion. In a South African cohort of 94 children aged 3 to 5, higher stored vitamin A went with lower height and weight scores and explained 6 to 10 percent of the variation before a supplement dose. Supplements, fortified food and liver all fed the same excess in that cohort, and there was no group of normal status to compare against, so liver cannot be pulled out of it. If you are pregnant, might be, or are feeding a small child, how big a portion and how often is a question for the person treating you, because nothing in our sources tests how often liver can be eaten in pregnancy. The same fact sheet names retinoid medicines, isotretinoin for severe acne and etretinate for severe psoriasis, alongside intakes above the upper limit as causes of those same birth defects. We also found nothing that measures what frying or braising does to the vitamin A in liver.

Sources

1. bflv-r3-01 · fact sheet
   Concentrations of preformed vitamin A are highest in liver, fish, eggs, and dairy products [1].
   NIH Office of Dietary Supplements, Vitamin A and Carotenoids Fact Sheet for Health Professionals · checked 2026-09-24
2. bflv-r3-02 · fact sheet
   The body might absorb up to 75% to 100% of retinol and, in most cases, 10% to 30% of beta-carotene from foods [17,18].
   NIH Office of Dietary Supplements, Vitamin A and Carotenoids Fact Sheet for Health Professionals · checked 2026-09-24
3. bflv-r3-03 · fact sheet
   Cooking and heat treatment can increase the bioavailability of beta-carotene from foods [19].
   NIH Office of Dietary Supplements, Vitamin A and Carotenoids Fact Sheet for Health Professionals · checked 2026-09-24
4. bflv-r3-10 · case-control study
   In a multivariate analysis fruit (Ptrend < 0.0001), vegetable (P = 0.001) and sunflower oil (P = 0.006) remained as protective factors and rice (P = 0.008), bread (Ptrend = 0.04), liver (P = 0.004), butter (Ptrend = 0.04), white cheese (Ptrend < 0.0001), beef (Ptrend = 0.005), vegetable ghee (P < 0.0001) and, animal ghee (P = 0.015) remained as risk factors of lung cancer.
   BMC Cancer, 2014 · checked 2026-09-24
5. bflv-r3-11 · cross-sectional study
   After controlling for potential confounders, women in the highest quartile of red meat had a highest prevalence of depressive symptoms (OR: 2.51; 95% CI: 1.32-4.76; p = 0.002), anxiety (OR: 1.82; 95% CI: 1.00-3.29; p = 0.034) and stress (OR: 3.47; 95% CI: 1.88-6.42; p < 0.001) compared with those in the lowest quartile.
   Complement Ther Med, 2021 · checked 2026-09-24
6. bflv-r3-05 · fact sheet
   Because vitamin A is fat soluble, the body stores excess amounts, primarily in the liver, and these levels can accumulate. Acute vitamin A toxicity, also referred to as hypervitaminosis A, occurs within days to weeks after someone ingests one or a few very high doses (typically more than 100 times the RDA) [85].
   NIH Office of Dietary Supplements, Vitamin A and Carotenoids Fact Sheet for Health Professionals · checked 2026-09-24
7. bflv-r3-06 · meta-analysis
   Concerning food type, OTA prevalence was highest in the poultry gizzard (66%) and lowest in the cow liver (2%).
   Food Chem Toxicol, 2023 · checked 2026-09-24
8. bflv-r3-09 · prevalence survey
   Campylobacter jejuni was detected in 4 of the 316 samples analyzed: 1 raw beef liver sample and 3 raw chicken samples.
   J Food Prot, 2008 · checked 2026-09-24
9. bflv-r3-08 · retrospective cohort
   During the pre-intervention period (before week 27, 2012), there were 0.45 asymptomatic EHEC infections per million-persons per week. The mean post-intervention asymptomatic EHEC infections were 0.51 per million-persons per week.
   BMC Infect Dis, 2019 · checked 2026-09-24
10. bflv-r3-04 · fact sheet
    Total intakes of preformed vitamin A that exceed the UL as well as some retinoid medications used as topical therapies (such as isotretinoin, used to treat severe acne, and etretinate, a treatment for severe psoriasis) can cause congenital birth defects [1]. These birth defects can include malformations of the eye, skull, lungs, and heart [14]. Experts advise women who are or might be pregnant and those who are lactating not to take high doses (more than 3,000 mcg RAE [10,000 IU] daily) of vitamin A supplements [1].
    NIH Office of Dietary Supplements, Vitamin A and Carotenoids Fact Sheet for Health Professionals · checked 2026-09-24
11. bflv-r3-07 · randomised controlled trial
    We conducted a series of studies to test the acceptability of complementary foods fortified with either powdered beef liver, beef meat, beef liver + meat or placebo among 96 Indonesian children aged 12 to 23 mo...The low disappearance rate of the study powders during the home trial was a concern, with mothers reporting a strong smell and fishy odor as the major reason why children did not like their meals.
    J Food Sci, 2017 · checked 2026-09-24
12. bflv-r3-13 · cross-sectional survey
    Association of food groups labeled as in USDA guideline with the haemoglobin level, was statistically insignificant except in the case of beef and liver intake (meat group) showing association of beef liver intake with haemoglobin level.
    J Pak Med Assoc, 2014 · checked 2026-09-24
13. bflv-r3-12 · cohort analysis
    Government-mandated VA supplementation (VAS) and adequate intake through dietary fortification and liver consumption led to excessive VA in South African children...In this largely hypervitaminotic A cohort, HAZ, WAZ, and WHZ were negatively associated with increasing TLRs, where TLRs predicted 6-10% of the variation before VAS (P < 0.05), increasing to 14-19% 4 wk after VAS (P < 0.01).
    Am J Clin Nutr, 2022 · checked 2026-09-24