Vitamin A and its dervatives effect on bone mineral density, a systematic review.

Background: Even though vitamin A (Vit A) is one of the essential vitamins required for bone growth and development, it is still uncertain whether its effect on bone mineral density (BMD) is beneficial or harmful.

Aim: To assess Vit A's effect and its derivatives on BMD and the risk of developing osteoporosis.

Data Sources: PubMed, Cochrane Library, Science Direct, Embase, and Google Scholar were searched in February 2019 and updated in November 2020.