These birth defects can include malformations of the eye, skull, lungs, and heart.Retinoids Several synthetic retinoids derived from vitamin A are used orally as prescription medicines.

The Journal of Nutrition 2010;140:2268S-85S.Although these intakes are lower than the RDAs for individual men and women, these intake levels are considered to be adequate for population groups.Fetal and early infant death.

Dietary supplement use in the United States.This condition can be reversed by discontinuing beta-carotene ingestion.In the Carotene and Retinol Efficacy Trial (caret 18,314 current and former smokers (including some males who had been occupationally exposed to asbestos) took daily supplements containing 30 mg beta-carotene and 25,000 IU retinyl palmitate for 4 years, on average.