Ingredient caution: vitamin C/ascorbic derivatives might cause tingling, redness or irritation in sensitive skin; fragrance, essential oils or fragrance allergens might trigger redness, itching or allergic irritation; cleansing surfactants might cause dryness, stinging or tightness if overused; 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 and avoid layering with strong exfoliating acids if the skin stings. Avoid this product if you have fragrance allergy, eczema-prone skin or a damaged barrier. Use lukewarm water, do not scrub, and follow with moisturiser. Do not apply on broken, freshly waxed or irritated skin. Stop use if irritation persists.