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Aspartic Acid

What Aspartic Acid is & what it does

An amino acid used as a humectant and conditioning agent that hydrates and supports a smooth surface. It also helps buffer pH.

What does Aspartic Acid do in skincare?

Aspartic Acid is an amino acid used in skincare mainly as a skin-conditioning and humectant-type ingredient that can help support a hydrated surface feel. Amino acids are also natural building blocks present in skin, which is part of why they are used in conditioning formulas. It is usually a supporting ingredient rather than the main active.

Is Aspartic Acid safe?

Aspartic Acid is a naturally occurring amino acid and is generally considered safe at the levels used in cosmetics. It is one of the standard amino acids found in proteins throughout the body. As with any ingredient, those with very sensitive skin can patch test, but it is broadly well tolerated.

Is Aspartic Acid natural or synthetic?

Aspartic Acid occurs naturally as one of the body's amino acids, but the version used in cosmetics is typically produced by fermentation or synthesis for consistency and purity. So it can be described as a naturally occurring molecule that is usually made through controlled production. Its source does not change its basic chemical identity.

Sunscreens with Aspartic Acid

We rate 38 sunscreens that contain it, showing the top 10 by overall score:

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