Ingredient caution: glycolic acid/AHA might cause stinging, dryness, peeling, redness and increased sun sensitivity; alpha arbutin, azelaic acid, kojic acid, licorice extract, tranexamic acid might cause tingling, dryness or redness in sensitive skin; rich oils, butters or occlusive emollients might feel heavy or clog pores in acne-prone/oily skin; preservatives such as phenoxyethanol/benzyl alcohol might sting very sensitive or compromised skin. Do a patch test before applying. First-time users should start 3–4 times a week, avoid using it with retinol or other exfoliating acids in the same routine, and apply sunscreen daily. First-time users should start 3–4 times a week and pair with sunscreen, because pigmentation care works best with UV protection. Use a small amount first and avoid applying on active acne if it feels greasy. Do not apply on broken, freshly waxed or irritated skin. Stop use if irritation persists.