Ursa Major Brighten Up Vitamin C Serum. This Product Is:. a hydrating facial serum. Good for:. all skin types including dry, mature, sensitive, blemish-prone, combination and normal. Why We Love It:. Ursa Major Brighten Up Vitamin C Serum is a featherweight facial serum that goes deep to provide instant hydration while brightening and smoothing skin’s tone and appearance. Use alone as a lightweight moisturizer, or layer beneath your favorite daily face lotion, sunscreen or night cream for an extra dose of naturally super goodness. This clean serum is rich in antioxidants to help improve the appearance of skin's firmness and elasticity..