Medik8 Crystal Retinal 20 Night Serum

Crystal Retinal 20 delivers 0.2% retinaldehyde - a next-generation form of vitamin A that converts to active retinoic acid in a single step, which is why it works considerably faster than standard retinol. Medik8's iconic night serum smooths the look of stubborn wrinkles, brightens dark spots, decongests and firms the skin, without the irritation retinoids are known for. This is the highest strength on the ladder, intended only for expert users who have completed a full tube of Crystal Retinal 10 with no irritation. It is not a starting point, and there is nothing to gain from skipping the steps below it. A patented retinal stability system keeps the formula potent until the last drop, which matters with an unstable active. Hyaluronic acid, vitamin E and glycerin keep skin hydrated and comfortable alongside it, offsetting the dryness higher-strength vitamin A can cause. Barrier support becomes non-negotiable at this level. Pair it with a ceramide-rich moisturiser and do not layer other exfoliating actives on the same night. Phase it in: twice a week for the first two weeks, every second night for the next two, then nightly. Apply two pumps to a cleansed face and neck in the evening, follow with Advanced Night Restore, and always wear sunscreen the next morning.