How to Phase in a Vitamin A
At Medik8, we recommend that retinol and retinal application is phased in gradually at night. We have developed a guide that allows the skin to get used to the ingredient and helps guarantee a really comfortable vitamin A experience:
At first, start with an entry level strength product, such as Intelligent Retinol 3TR or Crystal Retinal twice a week for the first 2 weeks, then once every other night for a further 2 weeks and then nightly application. Once your skin has built up a tolerance to the ingredient, you can then move on to a higher strength vitamin A.