- Because good skin is for everyone, Dr. Sensitive aspires to provide simple, skin-friendly everyday necessities that do what they need to do. From your cleansing needs, to blemish banishment, and brightening dark spots, Dr. Sensitive is your skin's new essential brand.Dr. SensitiveCollagen and Vit. C Serum is a fast absorbing serum that helps to brighten dull-looking skin. It has Collagen and Vitamin C that work together for brighter and firmer skin, so it feels soft, smooth, and supple to touch.