Does lactic acid increase sun sensitivity?

Higher-strength lactic acid exfoliates more aggressively and increases sun sensitivity.

Evidence

Source:: Smith WP. Int J Cosmet Sci. 1996;18(2):75-83
Applies to:: Formulations containing lactic acid
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

Lactic acid appears near the top of this list, indicating a significant concentration. At higher strengths it exfoliates more aggressively and increases sun sensitivity — daily sunscreen matters more while using it. Building up frequency gradually is the usual approach to limit irritation.

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

Does lactic acid increase sun sensitivity?

Higher-strength lactic acid exfoliates more aggressively and increases sun sensitivity.

Evidence

Source:: Smith WP. Int J Cosmet Sci. 1996;18(2):75-83
Applies to:: Formulations containing lactic acid
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