What it is
Acetyl dipeptide-1 cetyl ester is a short peptide made of two amino acids that has been acetylated and attached to a cetyl (fatty alcohol) ester to improve its compatibility with skin lipids. It is used in cosmetic formulations including sunscreens as a conditioning agent intended to support a calm, comfortable feel. Because of its lipid tail it integrates readily into emulsified products.
Safety & warnings
Lipidated peptides such as this are generally well tolerated at the low concentrations used in cosmetics and are not associated with common allergen or comedogenicity concerns.
Origin & sourcing
Synthetic; manufactured through peptide synthesis followed by acetylation and esterification with cetyl alcohol.
Questions everyone asks
What is acetyl dipeptide-1 cetyl ester?
It is a synthetic fatty-acid-modified peptide added to skincare and sunscreen formulas as a conditioning ingredient.
Is it the same as a moisturizer?
No; it is a conditioning agent that contributes to skin feel, while moisturizing is provided by humectants and emollients in the formula.