What it is
Tetraacetylphytosphingosine is a derivative of phytosphingosine, a sphingoid base related to the ceramides that occur naturally in the skin barrier. The acetylated structure improves its stability and formulating behavior, and it is used as a conditioning ingredient intended to support the feel and comfort of the skin. It is common in Korean skincare and is included in some sunscreens for its skin-conditioning role.
Safety & warnings
Sphingolipid derivatives of this type are generally well tolerated and non-irritating at cosmetic use levels, and they are not associated with notable allergenicity.
Origin & sourcing
Typically produced by fermentation followed by chemical acetylation, yielding a defined sphingolipid derivative used in cosmetics.
Questions everyone asks
What is tetraacetylphytosphingosine?
It is a stabilized, acetylated form of phytosphingosine, a skin lipid related to ceramides, used as a conditioning ingredient.
Why is it used in sunscreen?
It is included as a skin-conditioning ingredient meant to support the comfort and feel of the skin barrier.