How to Phase in a Vitamin A

Start by using it twice a week for the first 2 weeks, then every other night for the next two weeks, and then nightly. Once your skin has adjusted and built tolerance, you can move on to a higher strength vitamin A, making your way up our unique ladder of progressive strengths.

When moving up within the Crystal Retinal ladder (eg. from Crystal Retinal 3 to Crystal Retinal 6), there’s no need to phase in, but you must complete at least 1 tube of the previous strength before advancing. For Crystal Retinal 24, our highest strength, monitor your skin closely during the first two weeks of use. If you experience any sensitivity, reduce the amount of product you apply or apply every other night to begin with.