Vitamin C is one of skincare's most powerful multitaskers that brightens dull complexions, fades dark spots, boosts collagen production and protects against environmental damage. Now, Neutrogena, a brand loved by Jennifer Garner, is putting this powerhouse vitamin front and center in its newest launch. The Collagen Bank 15% Vitamin C Face Serum is a targeted serum designed to revitalize aging skin and bring back that healthy, natural glow.