I love Medik8 as use all their skincare but unfortunately this product is too strong for my sensitive skin. Purchased direct last month. EXP 4/7/27 . Please see photo from a conversation with Medik8 as proof of expiry date. Paid £39. Sleep Glycolic is an at-home AHA (alpha hydroxy acid) peel treatment that delivers fast results overnight, without the usual redness and irritation associated with peel formulas. The leave-on treatment harnesses the power of 10% active glycolic acid to transform the look of dull, uneven and congested complexions.