What it is
Dehydrocholesterol is a sterol structurally related to cholesterol that occurs in skin lipids. In formulations it functions as a skin-conditioning and emollient component, often included as part of a lipid or barrier-support blend. It is typically used at low levels.
Safety & warnings
Sterols of this type are generally well tolerated in topical use at the low levels found in cosmetics. As a lipid-like material it has limited fragrance-allergen relevance, but as with any lipid-rich ingredient, individual tolerance varies.
Origin & sourcing
It can be derived from natural sterol sources or produced synthetically; the form used in cosmetics is a refined sterol material.
Questions everyone asks
What does dehydrocholesterol do in a sunscreen?
It acts as a skin-conditioning and emollient ingredient, contributing to a lipid blend that supports a smooth feel on the skin.
Is dehydrocholesterol the same as cholesterol?
It is closely related to cholesterol structurally but is a distinct sterol; both are skin-conditioning lipids used in cosmetics.