Source: https://www.instyle.com/beauty/vitamin-c-skin-benefits

To understand the advantages of using vitamin C on the skin, it’s first worth noting the different types of vitamin C out there. Depending on your skin type and concern, you may decide to go with one form of vitamin C over another.

L-ascorbic acid happens to be the most beneficial and effective of all forms. However, if you’ve got acne-prone skin, Dr. Henry recommends using synthetic, stable, and water-soluble sodium ascorbyl phosphate. Some research shows sodium Ascorbyl Phosphate can be effective at treating breakouts when used in one-percent and five-percent concentrations and combined alongside acne-fighting ingredients like benzoyl peroxide, she tells us. If you’re looking for a vitamin C product that will deeply penetrate the skin, pick one with oil-soluble Tetrahexyldecyl Ascorbate, a derivative of L-ascorbic acid.

When used correctly, vitamin C (in all its forms) is capable of treating a myriad of common skincare concerns:

Slows and/or reverses signs of aging: Vitamin C is a powerful antioxidant that neutralizes free radicals — which can lead to premature wrinkles and fine lines. “The antioxidant activity of vitamin C protects against UV-induced damage caused by free radicals, which will prevent accelerated aging and skin cancer,” Dr. Henry explains.

Improves elasticity: As we age, skin loses its elasticity due to a decrease in collagen synthesis. “[Vitamin C] boosts firmness by regulating collagen production,” says Dr. Henry. The result? Plumper-looking skin.

Treats dark spots and hyperpigmentation: According to Dr. Henry, vitamin C can have a brightening effect because it interferes with the enzymes used in melanin production.