Bright Citrus Serum

What it is: A natural facial serum packed with 20-percent vitamin C to help put your skin's metabolic processes to work.

Who it's for: Oily and acne-prone skin types.

What it does: Vitamin C, with additional stabilization from the antioxidant properties in mulberry extract, helps with scarring, post-inflammatory hyperpigmentation (PIH) and discoloration. The goal is bright, radiant skin, even after a long night or an early morning, or both. It has a citrusy scent naturally occurring from grapefruit oil.

How to use: Apply 3–5 drops of serum to bare skin or mixed in with a moisturizer every night. If used twice a day, be sure to include SPF in your routine, as vitamin C can increase your skin's photosensitivity.