Liver & Liver Products
Everyday exposureFood & drinkAlso called · 9 names▾▴
liver in pregnancy, liver pâté, pate, liver sausage, chicken liver, beef liver, vitamin A liver, retinol pregnancy, liver products
Meats
General information · effects depend on amount, timing, and how it is used. About these sources
Research strength: 3 / 5
The NHS and EFSA advise pregnant people not to consume liver or liver products because liver can provide high amounts of preformed vitamin A. Rothman et al. (1995) reported a higher prevalence of certain birth defects with high vitamin A intake, especially before week 7; Mastroiacovo et al. (1999) did not find an increased rate in a smaller study. Neither study identifies a liver portion linked to a birth defect. NIH focuses on total preformed vitamin A and high-dose supplements rather than a liver-specific rule, so sources differ in how they apply the evidence to food. Ask your provider about your situation.
Last reviewed: 2026-10-18
Sources
- NHS: Foods to avoid in pregnancyUK government
- UK COT: Statement on the effects of excess vitamin A on maternal healthUK government
- EFSA: Scientific opinion on the tolerable upper intake level for preformed vitamin A and beta-caroteneEU agency
- CDC: Vitamins A and E and CarotenoidsUS government
- NIH Office of Dietary Supplements: Vitamin A and Carotenoids, Health Professional Fact SheetUS government
- Rothman et al. 1995, NEJM, PubMed abstractUS government
- Mastroiacovo et al. 1999, Teratology, PubMed abstractUS government
Research strength: 3 / 5
UK and EFSA pregnancy guidance applies throughout pregnancy and advises not consuming liver products. Rothman et al. (1995) studied first-trimester intake and found that its defect signal was concentrated before week 7; this does not establish a risk from liver portions in the second trimester. Mastroiacovo et al. (1999) did not find an increased rate, but its smaller cohort could not rule out smaller increases. NIH sets a total-intake limit for preformed vitamin A rather than a liver-specific rule, so sources differ in how they apply the evidence to food. Ask your provider about your situation.
Last reviewed: 2026-10-18
Sources
- NHS: Foods to avoid in pregnancyUK government
- UK COT: Statement on the effects of excess vitamin A on maternal healthUK government
- EFSA: Scientific opinion on the tolerable upper intake level for preformed vitamin A and beta-caroteneEU agency
- CDC: Vitamins A and E and CarotenoidsUS government
- NIH Office of Dietary Supplements: Vitamin A and Carotenoids, Health Professional Fact SheetUS government
- Rothman et al. 1995, NEJM, PubMed abstractUS government
- Mastroiacovo et al. 1999, Teratology, PubMed abstractUS government
Research strength: 3 / 5
NHS and EFSA pregnancy guidance advises not consuming liver products during pregnancy. Rothman et al. (1995) studied first-trimester intake, with its defect signal concentrated before week 7, so it does not establish a late-pregnancy risk estimate for liver. Mastroiacovo et al. (1999) did not find an increased rate, but its smaller study had limited power. NIH sets a total-intake limit for preformed vitamin A rather than a liver-specific food rule, so authorities differ in how they frame food guidance. Ask your provider about your situation.
Last reviewed: 2026-10-18
Sources
- NHS: Foods to avoid in pregnancyUK government
- UK COT: Statement on the effects of excess vitamin A on maternal healthUK government
- EFSA: Scientific opinion on the tolerable upper intake level for preformed vitamin A and beta-caroteneEU agency
- CDC: Vitamins A and E and CarotenoidsUS government
- NIH Office of Dietary Supplements: Vitamin A and Carotenoids, Health Professional Fact SheetUS government
- Rothman et al. 1995, NEJM, PubMed abstractUS government
- Mastroiacovo et al. 1999, Teratology, PubMed abstractUS government
Liver & Liver Products — Breastfeeding
Research strength: 3 / 5
NIH lists a 3-ounce serving of pan-fried beef liver as 6,582 mcg RAE and sets the adult upper limit for preformed vitamin A at 3,000 mcg RAE per day. EFSA applies the same adult limit to lactating adults and estimates that liver or offal once a month or less is unlikely to exceed it in European populations. These are total-intake limits, not a breastfeeding-specific liver rule. The guidance reviewed here does not report infant outcomes from a mother's liver meal. Ask your provider about your situation.
Last reviewed: 2026-10-18
Sources
- NIH Office of Dietary Supplements: Vitamin A and Carotenoids, Health Professional Fact SheetUS government
- EFSA: Scientific opinion on the tolerable upper intake level for preformed vitamin A and beta-caroteneEU agency
Pregnancy
Rothman et al. (1995) prospectively collected first-trimester diet, medication, and illness information from 22,748 pregnant women; 339 babies had birth defects, and 121 had defects in tissues derived from the cranial neural crest. For these defects, the prevalence ratio was 3.5 (95% CI 1.7 to 7.3) when total preformed vitamin A intake from food and supplements exceeded 15,000 IU per day, compared with 5,000 IU per day or less. For supplements alone, more than 10,000 IU per day was associated with a prevalence ratio of 4.8 (95% CI 2.2 to 10.5), compared with 5,000 IU per day or less. The increased frequency of defects was concentrated among babies born to women with high intake before week 7. The authors estimated that about 1 infant in 57 had a malformation attributable to vitamin A supplements among women taking more than 10,000 IU per day. This was an observational study of total intake and supplements, not a study of a defined liver portion. Mastroiacovo et al. (1999) prospectively followed 423 pregnancies exposed to at least 10,000 IU of vitamin A per day in the first 9 weeks; outcomes were assessed in 311 infants exposed to a median 50,000 IU per day. Three major malformations were reported, and none were reported among 120 infants exposed to more than 50,000 IU per day. The authors reported that the sample "did not provide evidence for an increased risk of major malformations associated with high vitamin A intake during the organogenetic period higher than 2.76 above the control reference risk of 1.91% (power 80%, alpha 0.10)." We do not convert this abstract wording into a fold or a liver-meal risk estimate. This study did not isolate liver meals. The CDC's 2026 nutrition report says excess vitamin A during early pregnancy may lead to birth defects. UK COT says the government advice to limit preformed vitamin A remains appropriate. EFSA's 2024 opinion recommends that pregnant people not consume liver products and gives a total-intake limit, while NIH emphasizes the total upper limit and high-dose supplements.
Breastfeeding
NIH sets an adult upper limit of 3,000 mcg RAE per day for preformed vitamin A and says this limit applies to vitamin A from animal foods and supplements containing retinol or retinyl esters. NIH lists a 3-ounce serving of pan-fried beef liver as 6,582 mcg RAE. EFSA's 2024 opinion applies the same adult limit to lactating people and estimates that European populations are unlikely to exceed it if liver, offal, and products are consumed once per month or less. These are total-intake benchmarks, not evidence that one serving causes an infant effect through milk. The cited sources do not report infant outcomes from a maternal liver meal.
CDC says liver and fish-liver oils have higher vitamin A content. NIH explains that animal foods contain preformed vitamin A, including retinol and retinyl esters, while plant foods contain provitamin A carotenoids such as beta-carotene. NIH lists 3 ounces of pan-fried beef liver as 6,582 mcg RAE. The NHS and UK COT identify liver products such as pâté in pregnancy guidance. CDC separately advises pregnant people to avoid refrigerated pâté or meat spreads and choose shelf-stable products; it does not specify a reheating exception for them.
What was tested
Rothman et al. collected reported first-trimester food and supplement intake and compared total vitamin A intake groups with birth-defect outcomes in 22,748 pregnancies. Mastroiacovo et al. followed high-dose vitamin A exposures during the first 9 weeks and assessed structural malformations in 311 infants. Neither study isolated a liver serving or tested the same vitamin A amount from liver against the same amount from supplements. EFSA's 2024 opinion reviewed evidence on teratogenicity, liver effects, and bone health to set upper intake levels.
Pregnancy advice on liver products versus total vitamin A intake limits
- Source A says
- The NHS and UK COT describe UK pregnancy advice not to consume liver or liver products. EFSA's 2024 opinion also advises pregnant people not to consume liver products and applies its adult upper limit to pregnancy. (NHS: Foods to avoid in pregnancy, UK COT: Statement on the effects of excess vitamin A on maternal health, EFSA: Scientific opinion on the tolerable upper intake level for preformed vitamin A and beta-carotene)
- Source B says
- NIH ODS sets a daily upper limit for total preformed vitamin A from animal foods and supplements and warns against high-dose supplements during pregnancy, but does not state a liver-specific food rule. (NIH Office of Dietary Supplements: Vitamin A and Carotenoids, Health Professional Fact Sheet)
- Why they differ
- The agencies agree that excess preformed vitamin A can affect fetal development, but they translate the evidence into food advice differently. The NHS and EFSA give a liver-specific pregnancy recommendation. NIH ODS focuses on a total daily limit and high-dose supplements, and does not provide a liver-specific ban.
- What the evidence shows overall
- The evidence supports concern about high preformed vitamin A intake, but neither primary study establishes a risk threshold for one liver meal. The UK and EFSA recommendations cover liver products during pregnancy, while NIH describes total-intake limits. The sources should be read together; neither primary study establishes that one portion causes a birth defect.
Human studies of high vitamin A intake and birth defects
- Source A says
- Rothman et al. reported a higher prevalence of cranial neural-crest defects at high preformed vitamin A intake, with the signal concentrated before week 7. (Rothman et al. 1995, New England Journal of Medicine, PubMed abstract)
- Source B says
- Mastroiacovo et al. found no evidence of an increased rate of major malformations after prospectively following high-dose early-pregnancy exposures. (Mastroiacovo et al. 1999, Teratology, PubMed abstract)
- Why they differ
- The studies used different designs and populations. Rothman assessed reported intake in a large cohort. Mastroiacovo followed high-dose exposures reported to teratology services, but the sample was too small to rule out smaller increases.
- What the evidence shows overall
- Rothman found an association at high reported intake, especially early in pregnancy, while the smaller Mastroiacovo study did not find an increased rate. Neither study measured a defined liver portion, so neither establishes a liver-specific threshold.
Pâté guidance for Listeria versus liver's vitamin A
- Source A says
- The NHS pregnancy foods page says meat pâté and vegetable pâté should be kept chilled and eaten before the use-by date. A separate NHS meat page says pregnant people should avoid pâté of all types, including vegetable pâté. (NHS: Foods to avoid in pregnancy, NHS: Meat in your diet)
- Source B says
- CDC advises pregnant people to avoid refrigerated pâté or meat spreads and choose shelf-stable products. The pâté row gives no 165°F or steaming-hot reheating exception. (CDC: Preventing Listeria Infection)
- Why they differ
- The two NHS pages give different advice about refrigerated pâté. CDC and FoodSafety.gov distinguish refrigerated products from shelf-stable alternatives; unlike some other ready-to-eat foods, their pâté advice does not offer a reheating workaround. The liver-specific vitamin A advice is a separate issue.
- What the evidence shows overall
- Keep the pregnancy recommendation for liver products tied to preformed vitamin A; heating or shelf-stability does not remove that nutrient. For the separate Listeria question about refrigerated pâté and meat spreads, report the CDC shelf-stable alternative and do not imply that reheating is an endorsed exception.
- The NHS lists liver and liver products among foods to avoid during pregnancy and says liver and foods containing liver have high vitamin A levels. (NHS)
- EFSA advises people who are pregnant or planning pregnancy not to consume liver products. Its opinion says European populations are unlikely to exceed the preformed vitamin A upper limit if liver, offal, and products are consumed once per month or less. (EFSA)
- NIH ODS lists an adult upper limit of 3,000 mcg RAE per day for preformed vitamin A and lists 3 ounces of pan-fried beef liver as 6,582 mcg RAE. (NIH Office of Dietary Supplements)
- CDC advises pregnant people to avoid refrigerated pâté or meat spreads and choose products in sealed, airtight containers that do not need refrigeration before opening. This is Listeria guidance, not a heating workaround for liver's separate vitamin A pregnancy recommendation. (CDC)
General research, not specific to pregnancy.
Outside pregnancy, NIH and EFSA describe upper limits for total preformed vitamin A rather than a limit for one liver meal. NIH notes that regularly consuming high doses can affect skin, muscles, joints, energy, mood, and liver test results.
- NIH lists the adult upper limit for preformed vitamin A at 3,000 mcg RAE per day and says the limit applies to animal foods and supplements containing retinol or retinyl esters. (NIH Office of Dietary Supplements: Vitamin A and Carotenoids, Health Professional Fact Sheet)
- NIH lists 3 ounces of pan-fried beef liver as 6,582 mcg RAE of vitamin A. (NIH Office of Dietary Supplements: Vitamin A and Carotenoids, Health Professional Fact Sheet)
- NIH reports that regular high intake of preformed vitamin A can cause dry skin, painful muscles and joints, fatigue, depression, and abnormal liver test results. (NIH Office of Dietary Supplements: Vitamin A and Carotenoids, Health Professional Fact Sheet)
- EFSA says European populations are unlikely to exceed the adult upper limit if liver, offal, and products thereof are consumed once per month or less. (EFSA: Scientific opinion on the tolerable upper intake level for preformed vitamin A and beta-carotene)
Experiences from moms and non-medical voices. Not medical evidence.
- NHS: Foods to avoid in pregnancyUK governmentSecondary
- UK COT: Statement on the effects of excess vitamin A on maternal healthUK governmentSecondaryPage dated 2026-06-25
- EFSA: Scientific opinion on the tolerable upper intake level for preformed vitamin A and beta-caroteneEU agencySecondaryPage dated 2024-06-06Independent check
- NIH Office of Dietary Supplements: Vitamin A and Carotenoids, Health Professional Fact SheetUS governmentSecondaryPage dated 2025-03-10Independent check
- CDC: Vitamins A and E and CarotenoidsUS governmentSecondary
- Rothman et al. 1995, New England Journal of Medicine, PubMed abstractUS governmentPrimaryIndependent check
- Mastroiacovo et al. 1999, Teratology, PubMed abstractUS governmentPrimaryIndependent check
- NHS: Meat in your dietUK governmentSecondary
- CDC: Preventing Listeria InfectionUS governmentSecondaryPage dated 2025-01-31
Last reviewed 2026-10-18
Independent check 2026-10-18
Not yet clinician-reviewed
Ask your provider about your situation.