Sunscreen

Skin care product meant for protecting the skin against the harmful rays of the sun.

Sheet mask

A kind of face mask that can be worn on the face like a soft sheet and taken off gently.

Serum

A lightweight liquid product that is easily absorbed by the skin and contains a high concentration of active ingredients that target specific skin concern.

Sensitive skin

A type of skin that is prone to inflammation and irritation due to environment and/or topical applications.

Skin barrier

The protective outermost layer of the epidermis. called the ‘stratum corneum’, made of dead skin cells embedded in a matrix of acid and lipids.

Sodium PCA

Abbreviated form of sodium 5-oxo-2-pyrrolidinecarboxylate, a salt derived from the amino acid Proline, which is one of the natural building blocks of proteins.