Vitamin A in pregnancy and planning: food, supplements and retinoids

Vitamin A is needed; excess is the concern

Vitamin A contributes to normal development and health during pregnancy. The question is not whether to avoid the nutrient entirely: it is which form, how much comes from all sources, and whether a medicine has separate restrictions. High intakes of preformed vitamin A can harm a developing baby. Retinol and retinyl esters are preformed forms; beta-carotene in foods is a precursor the body can convert. Their risks are not identical. See the food and forms guide.2

What should I check on a prenatal label?

A prenatal multivitamin, a separate vitamin and fish liver oil can contain overlapping ingredients. Look for retinol, retinyl acetate or retinyl palmitate as well as beta-carotene, and check the amount and serving for every product. “Prenatal” alone does not tell you the contents: formulations differ. The vitamin A label guide shows a worked example.

In the UK, the NHS advises avoiding supplements and multivitamins containing vitamin A as retinol during pregnancy. US guidance recognises that some prenatal products contain preformed vitamin A, while warning against excess. This difference in guidance does not let a reader decide whether one particular product is suitable; ask a pharmacist, midwife or clinician familiar with the product and local guidance. Avoiding retinol supplements does not mean stopping folic acid recommended or prescribed for pregnancy; see folate and folic acid.32

Does that include liver, fish and vegetables?

The UK NHS advises avoiding liver and liver products in pregnancy because they can contain high amounts of preformed vitamin A; its advice also says to avoid cod liver oil. Ordinary fish oil and fish liver oil are not interchangeable product names, so read the exact package. Pregnancy food guidance covers other issues as well, including which fish and foods to limit or avoid for reasons unrelated to vitamin A.

Carrots and leafy greens contain provitamin A carotenoids, not the same preformed vitamin A found in liver. The concern about excess preformed vitamin A should not be turned into a claim that ordinary vegetables are equivalent to high-dose retinol supplements.342

What if I take isotretinoin or another oral retinoid?

Oral retinoids are medicines, not ordinary prenatal supplements. Isotretinoin, acitretin and alitretinoin have pregnancy-prevention requirements in UK and EU guidance. Different medicines can remain relevant for different periods after treatment, so do not apply one medicine’s schedule to another. Discuss pregnancy plans with the prescribing team before trying to conceive.86710

For oral isotretinoin specifically, UK MHRA patient materials say that if you think you may be pregnant or have unprotected sex during treatment, stop taking it immediately and seek medical advice. If this happens within one month after stopping treatment, contact your dermatology team or prescriber urgently as well. The patient reminder card also says to seek emergency contraception after unprotected sex; the options have time limits, so seek advice promptly. If you have used another retinoid, check its patient information and contact the prescribing team promptly; treatment and precautions depend on the medicine.810

What about retinoids applied to the skin?

The EU medicines regulator distinguishes oral retinoids from medicinal retinoids applied to the skin. Absorption from the topical medicines reviewed is much lower, and the regulator judged fetal harm unlikely; nevertheless, as a precaution these topical medicines must not be used during pregnancy or while planning pregnancy. The UK MHRA gives similar precautionary advice for specified topical retinoid medicines. The EMA product-information wording says treatment should be discontinued if one of the reviewed topical retinoids is used during pregnancy or pregnancy occurs during treatment; contact the prescriber for advice about the exact medicine.167

A cosmetic serum and a prescription medicine can contain different ingredients and concentrations. The regulatory review does not assess every cosmetic product. If you are pregnant or planning pregnancy, show the actual skincare product to a clinician or pharmacist rather than assuming that a name or route settles the question. For the evidence on skin products and their different uses, see vitamin A, retinol and skin.

Why does WHO discuss supplements in some settings?

Vitamin A deficiency can be a serious public-health problem in some places. WHO recommends vitamin A supplementation for pregnant women only in areas where deficiency is a severe public-health problem, to prevent night blindness. WHO says the evidence does not show that supplementation during pregnancy reduces illness or death in mothers or infants. The recommendation addresses a specific population and outcome; it is not a general instruction to begin high-dose supplements at home. A clinician can assess an individual at risk of deficiency wherever they live.5

I have already used a product. What information helps?

Use of a product does not by itself establish that harm has occurred, and a general article cannot calculate an individual risk. Note the exact product and ingredient, amount per serving, how often and when it was used, and where you are in pregnancy or planning. Keep the package or take a photo of the label and contact a midwife, pharmacist or clinician. For possible pregnancy during oral isotretinoin use, follow the urgent medicine-specific instruction above rather than waiting for a routine appointment.28

Does breastfeeding change the question?

Pregnancy and breastfeeding are different stages, and the right advice depends on the product. The NHS says oral isotretinoin must not be taken while breastfeeding. If you are breastfeeding and considering a supplement or other retinoid product, discuss the exact formulation and your circumstances with a pharmacist, midwife or prescriber. See also the folate and folic acid guide for a different pregnancy-related nutrient question.93