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Skin Care Ingredient Dictionary

Easily find ratings for thousands of meticulously-researched ingredients.

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3-O Ethyl Ascorbic Acid

This potent antioxidant is a highly stable form of vitamin C that improves skin tone, helps fade discolorations, and visibly firms skin.
Best

Acai

Pronounced "ah-sigh-ee", this small berry has a deep purple colour and is a rich source of antioxidants.
Best

Acerola Fruit Extract

This fruit extract is a potent source of antioxidants and hydrating polysaccharides.
Best

Acetyl Dipeptide-1 Cetyl Ester

A lab-made skin-firming peptide formed from a reaction between acetic acid, cetyl alcohol and dipeptide-1, which contains the amino acids arginine and tyrosine.
Best

Acetyl Hexapeptide-1

Acetyl hexapeptide-1 is a synthetic peptide composed of the amino acids alanine, arginine, histidine, leucine, phenylalanine and tryptophan.
Best

Acetyl Hexapeptide-37

This synthetic peptide is composed of amino acids (alanine, proline, serine, and glycine). It works to help skin’s layers maintain adequate hydration.
Best

Acetyl Hexapeptide-8

One of several peptides used in skin care products, this ingredient has skin-restoring and water-binding properties, helping it improve both the look and feel of skin.
Best

Acetyl sh-Hexapeptide-5 Amide Acetate

Often called simply "hexapeptide-5", this peptide is derived from the versatile protein versican, which plays a role in skin’s extracellular matrix. Topical use promotes a firmer look and feel.
Best

Acetyl Tetrapeptide-11

Acetyl tetrapeptide-11 is a synthetic peptide that helps skin look and feel healthier.
Best

Acetyl Tetrapeptide-5

Acetyl tetrapeptide-5 is a synthetic peptide that has calming, smoothing, hydrating, and firmness-enhancing benefits when applied to skin.