Rare C Serum features a highly bio-available form of Vitamin C, which strengthens collagen, brightens the complexion and, as an added bonus, reduces the appearance of pore size by 20% in 4 weeks as tested! Regular use of Rare C Serum will promote supremely radiant, strong and youthful looking skin. - Balances, evens, and brightens skin tone. - Reduces appearance of fine lines, wrinkles, and pores. - Strengthens collagen and enhances collagen synthesis. - Soothes and hydrates skin.