
Vitamin C Serum Comparison ~ Timeless, Paula’s Choice, CSS
Over the past 9 months I’ve tried 3 different Vitamin C serums to see how they differ and which one I like best. The 3 products I tried were Timeless 20% C + E + Ferulic Acid Serum, Paula’s Choice Resist C-15 Super Booster, and Cosmetic Skin Solutions Vitamin C + …