Excited to give this Sunday Riley vitamin C serum a try! It has a higher amount of vitamin C in it (15%) so hoping I see a difference in the brightness & firmness of my skin. The others that I have tried before were 10%. - Amazon vitamin c serum, clean beauty, face serum, clean vitamin C, brightening serum, stocking stuffer, beauty essentials, anti-aging serum, hyperpigmentation, sun spot corrector LTKFindsUnder100 LTKBeauty LTKFindsUnder50