What the science says about Lactic Acid

Few or mixed studies. This claim isn't established.

• Lactic acid’s own effect on acne has not been measured in these studies
• 2 studies back this, but both used lactic acid together with other ingredients
• Used with other peel ingredients, it improved pimples, blackheads and whiteheads
• It worked less well than salicylic acid in one study and no better in the other

2 studies

1. 1.

   Jessner's solution vs. 30% salicylic acid peels: a comparative study of the efficacy and safety in mild-to-moderate acne vulgaris.

   Journal of cosmetic dermatology·2017RCT40 participantsPositive

   In a 12-week clinical trial of 40 people with mild-to-moderate facial acne, lactic acid used together with other ingredients improved acne, but less than salicylic acid peels.

   PubMed 27557589DOI

2. 2.

   Efficacy and safety of Jessner's solution peel in comparison with salicylic acid 30% peel in the management of patients with acne vulgaris and postacne hyperpigmentation with skin of color: a randomized, double-blinded, split-face, controlled trial.

   International journal of dermatology·2020Observational36 participantsPositive

   In a clinical trial of 36 people with acne, lactic acid used together with other peel ingredients improved pimples, blackheads and whiteheads, but it did not work better than salicylic acid.

   PubMed 32447767DOI