best vitamin c serum for face
Why Vitamin C Is a Game‑Changer for Your Skin Vitamin C, or L‑ascorbic acid, is the gold standard antioxidant in skincare. It neutralizes free radicals, reduces inflammation, and supports collagen synthesis. Clinical studies show that a 10‑15 % L‑ascorbic acid serum can brighten skin by up to 30 % after 12 weeks of use. That’s a measurable lift in … Read more
