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Page A-018
Common mistakes people make with glycolic acid
Layering physical scrubs, high-strength vitamin C, retinol, and glycolic acid in the same routine “for faster results”, which usually backfires as irritation and pigmentation.
Page A-019
When lactic acid makes skin dry: why it happens and how to prevent it
Combining too many actives at once: layering lactic acid with strong retinoids, vitamin C, and physical scrubs in the same routine is a common recipe for stinging, redness, and dehydration.