What it is
Inositol is a naturally occurring cyclic polyol, structurally a six-membered carbon ring bearing six hydroxyl groups, that is closely related to simple sugars. In cosmetic formulations it functions as a humectant and skin-conditioning agent, helping to attract and hold moisture for a softer, more hydrated feel. It is water-soluble and often used at low levels as part of moisturizing or soothing complexes.
Safety & warnings
Inositol is a widely used, well-characterized compound with a strong record of tolerability in topical products. It is generally considered non-irritating and non-comedogenic at cosmetic use levels.
Origin & sourcing
Can be naturally sourced or produced through controlled processing; inositol is found widely in plants and is also manufactured for use in foods, supplements, and cosmetics.
Questions everyone asks
Is inositol a vitamin?
It is a sugar-like polyol sometimes informally grouped with B-vitamin-related compounds, but in cosmetics it is used simply as a humectant and conditioning agent.
What does inositol do for the skin?
It acts as a humectant, helping the formula attract and retain moisture for a hydrated feel.