What does retinol mean?
Retinol is the naturally occurring form of vitamin A, a fat-soluble compound needed for vision, immune function, and the maintenance of healthy skin and other tissues. The body converts retinol into retinal and retinoic acid, which take part in processes including the visual cycle, cellular regulation, and skin renewal. Retinol occurs in foods such as liver, oily fish, eggs, and dairy products, and nutrition labels may identify its quantity as vitamin A. It is also used in skin-care products to promote smoother-looking skin. Because topical retinol can cause dryness, irritation, and increased sensitivity to sunlight, users are commonly advised to introduce it gradually and use sun protection. Retinol should not be confused with the broader class of vitamin A-related compounds called retinoids; it is one specific member of that class.
nounRetinol is the naturally occurring form of vitamin A, an organic compound that supports normal vision, immune function, and skin maintenance. It is also used in topical skin-care products, either in this form or as related vitamin A derivatives.
- The naturally occurring form of vitamin A, also used as an ingredient in skin-care and medical preparations.
"The dermatologist recommended a gentle retinol serum to improve the texture of her skin."
"Retinol is essential for the visual cycle that allows the eyes to function in low-light conditions."
"She began using retinol at night after her dermatologist cautioned that it could increase sensitivity to sunlight."
The plural is grammatically regular but rarely used because retinol is usually discussed as an uncountable substance or an ingredient.
"The researchers compared the stability of several retinols under different storage conditions."
Known as vitamin A1, retinol helps the eyes adapt to dim light and also powers much of the skin’s natural renewal.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does retinol come from?
The name retinol combines the English word retina with the chemical suffix -ol, which indicates an alcohol-like compound. Retina ultimately comes through Latin from rete, meaning “net,” a reference to the network of nerve fibres in the eye. The name therefore reflects the compound’s original association with vitamin A deficiency and visual function.
How retinol is actually used
In medicine and nutrition, retinol usually refers specifically to vitamin A1 rather than vitamin A generically. In skin-care marketing, it commonly denotes an active ingredient, while related compounds such as retinyl palmitate may also be described more broadly as vitamin A derivatives.
Easily confused with retinol
Retinol is one specific vitamin A compound, whereas a retinoid is the broader class of chemically related compounds derived from vitamin A.
Retinol is the active form of vitamin A, while retinyl palmitate is a more stable ester formed by combining retinol with palmitic acid.