Does sunscreen need to go on first or does it matter?
Glad you asked this – I think a lot of people are confused. If you are using a chemical sunscreen (like the Anthelios) which needs to bind to skin cells to work, generally put it on first. If you are using a physical sunscreen, like one with zinc or titanium, then it doesn’t matter so much because it works by reflecting light away from your skin with tiny little particles.
If you are layering several sunscreens like I do in high sunlight situations, then put the chemical one on first and then the physical sunscreen. Hope this is clear! Dr. I