What does propylene glycol do in skincare?

Propylene glycol increases how much of the other ingredients the skin absorbs.

Evidence

Source:: Fasano WJ et al. Toxicol In Vitro. 2011;25(8):1664-70
Applies to:: Formulations containing propylene glycol
What this does not establish:: How a given product performs on your skin. Finished-product pH and concentration are rarely published, so this describes the chemistry, not a measurement of any specific product.
Last reviewed:: 2026-09-26

In practice

Propylene glycol is a humectant and solvent that also increases skin penetration of whatever else is in the formula. That amplifies both the actives and any irritants — useful in a well-tolerated product, less so in one that already stings.

Dermasift analyses skincare formulations against published cosmetic science. This is information, not medical advice — for a diagnosed skin condition, speak to a dermatologist.

Check this against a product’s ingredient list

What does propylene glycol do in skincare?

Propylene glycol increases how much of the other ingredients the skin absorbs.

Evidence

Source:: Fasano WJ et al. Toxicol In Vitro. 2011;25(8):1664-70
Applies to:: Formulations containing propylene glycol
What this does not establish:: How a given product performs on your skin. Finished-product pH and concentration are rarely published, so this describes the chemistry, not a measurement of any specific product.
Last reviewed:: 2026-09-26

In practice

Dermasift analyses skincare formulations against published cosmetic science. This is information, not medical advice — for a diagnosed skin condition, speak to a dermatologist.

Check this against a product’s ingredient list