Vitamin A (Retinol equivalents)

Essential fat-soluble vitamin; pregnancy safety matters (avoid excess preformed vitamin A).

womens-healthimmune-supportskin-hairpregnancy

Dosing model

FLATFixed dose (no body-weight scaling).

Min dose

0 mg

Max dose

0 mg

Rounding

0 mg

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Evidence

2 records

Physiology / recommended intakes / safety

General population • Government evidence review

Moderate

ODS summarizes roles in reproduction/immune function and safety considerations for excess intake.

Dose: 0 mg • Duration: Daily / as needed

Citation: NIH ODS – Vitamin A and Carotenoids: Health Professional Fact Sheet

Teratogenicity of excess preformed vitamin A in pregnancy

Pregnant women • Prospective cohort study

Moderate

Among 22,748 pregnant women, those consuming >15,000 IU/day of preformed vitamin A had a 3.5-fold higher rate of cranial-neural-crest birth defects; an apparent threshold was identified near 10,000 IU/day of supplemental vitamin A.

Dose: 0 mg • Duration: First trimester exposure

Citation: Rothman KJ, et al. Teratogenicity of high vitamin A intake. N Engl J Med. 1995;333(21):1369-1373.

Forms

Capsule / tablet

Avoid excess retinol in pregnancy; carotenoids differ