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Ingredient pairing

Can I use glycolic acid, salicylic acid, and sunscreen together?

Short answerYes

Yes — they're chemically compatible; introduce slowly if your skin is sensitive. Real photosensitization — FDA found AHAs increase UV sensitivity (~18% more UV reddening after 4 weeks) that persists up to a week after stopping, so the real rule is daily SPF while using acids and for a week afterward, not that acids "must" be nighttime-only.

Sources

  1. 1.FDA Guidance for Industry: Labeling for Cosmetics Containing Alpha Hydroxy Acids ↗
  2. 2.Alpha Hydroxy Acids — cosmetic ingredient page (18% UV-sensitivity increase; ~1 week persistence). FDA ↗

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