Editor Tip: It can pill, so let it set for a few moments before applying ... for reactive skin types. First Aid Beauty's Dark ...

When used together, they can significantly improve skin tone, reduce dark spots ... Wait a few minutes after applying vitamin C to let it absorb before layering niacinamide.

"Niacinamide is a great skincare ingredient because it is safe for all skin types ... You'll want to use it after cleansing and toning but before you layer on any other serums or moisturizers.

Ahead, the 10 best collagen face masks we love to revive, plump, and smooth skin instantly.