Ingredient caution: salicylic acid/BHA might cause stinging, dryness, peeling, redness and increased sun sensitivity; high-strength niacinamide might cause flushing, tingling or small bumps in reactive skin; alpha arbutin, licorice extract might cause tingling, dryness or redness in sensitive 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 reduce frequency if redness or bumps appear. First-time users should start 3–4 times a week and pair with sunscreen, because pigmentation care works best with UV protection. Do not apply on broken, freshly waxed or irritated skin. Stop use if irritation persists.