NAD+

NAD+, a coenzyme every cell uses for energy; skincare uses a purified form.

What it does: Used in firming serums, balms and mists, marketed for bouncier, more energized-looking skin.
How often: Morning and evening in the serum and mist, with extra misting through the day when needed. The neck cream is used daily, and the multi-balm whenever skin needs it, including over makeup.