skinChemists Youth Series Retinol & Bakuchiol Mask 50ml - an intensive weekly treatment from the award-winning London skincare brand that targets fine lines, wrinkles and loss of firmness, firming and smoothing while hydrating and refreshing the skin. Key actives: bakuchiol, retinol and vitamin E. Suitable for mature skin and most skin types; perform a patch test if reactive. How to use: apply to clean, dry skin, avoid eyes and lips, leave 10–15 minutes, rinse and follow with serum and moisturizer; use 1–2 times per week. For external use only.