What vitamin is retinol a form of?

Retinol is a form of vitamin A. More precisely, it is an alcohol form of vitamin A1 and belongs to the family of fat-soluble retinoids.

The body uses retinol in several important pathways. It can be converted into retinal, a compound involved in the visual cycle, and then into retinoic acid, which helps regulate gene expression and supports processes such as cell differentiation. Vitamin A is therefore relevant to vision, immunity, growth, and maintenance of epithelial tissues.

Retinol is also common in skincare, where topical products use it to promote skin-cell turnover and support collagen-related changes. Cosmetic retinol is not identical to prescription retinoic acid: the skin must convert retinol through intermediate steps, so it is generally less potent but often more accessible.

A common mix-up is treating every retinoid as exactly the same substance. Retinoids are the broader chemical family, while retinol is one specific member. Retinyl esters, retinal, and retinoic acid are related vitamin A compounds, but they are chemically distinct and differ in how directly the body or skin can use them.