A customer walks into your pharmacy in Zürich, picks up two vitamin C serums, and asks a fair question that many teams still struggle to answer clearly. One says pure vitamin C. The other says a natural derivative. Which one works better, and how do I know it won’t oxidise before I finish it? If
The real difference between retinal and retinol comes down to speed. At its core, retinal works up to 11 times faster because it’s just a single step away from retinoic acid, the form of vitamin A your skin can actually use. Retinol, on the other hand, needs two steps to get there, which makes it
