HUMAN NUTRITION

Detailed explanation-1: -Overconsumption of beta-carotene can only cause carotenosis, a harmless and reversible cosmetic condition in which the skin turns orange. Preformed vitamin A absorption and storage in the liver occur very efficiently until a pathologic condition develops.

Detailed explanation-2: -The most common adverse effect of topical vitamin A is skin irritation, erythema, and peeling.

Detailed explanation-3: -Megadoses of vitamin A can cause liver toxicity. Although carotene is converted to vitamin A in the body, excessive ingestion of carotene causes carotenemia, not vitamin A toxicity. Carotenemia is usually asymptomatic but may lead to carotenosis, in which the skin becomes yellow.