How to Phase in a Vitamin A

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.

If you have been comfortably using Crystal Retinal 10 every night for 3 months or completed 2 full tubes without experiencing any recent sensitivity you may be ready to move up to our highest strength yet, Crystal Retinal 20. Crystal Retinal 20 is available only from skin clinics after consultation.