Serums have become increasingly popular due to not containing the oils of creams that can cause irritation. iS Clinical has a serum for every skin concern. Need superior moisture? Then Hydra Cool Serum is the key! Dull, dry skin? Poly-Vitamin Serum will have you brightened in no time. Needing anti-oxidant protection? Then checkout the Super Serum. And we can't forget about Active Serum. This amazing product targets hyperpigmentation, acne, and aging. There's a reason why it's a Hot Product!