1. Antioxidant properties: Vitamin C is rich in antioxidants, which help protect the skin from free radicals caused by environmental factors like pollution and UV radiation. This can prevent premature aging and damage to the skin.

2. Collagen production: Vitamin C is essential for collagen synthesis, a protein that helps keep the skin firm and youthful. By promoting collagen production, vitamin C can help reduce the appearance of fine lines and wrinkles.

3. Brightening effects: Vitamin C can help brighten the skin and fade hyperpigmentation or dark spots. It inhibits the enzyme tyrosinase, which is involved in the production of melanin, the pigment responsible for dark spots.

4. Sun damage protection: While not a replacement for sunscreen, vitamin C can enhance the effectiveness of sunscreen by neutralizing free radicals generated by UV rays. This can provide additional protection against sun damage.

5. Hydration: Vitamin C can also help improve skin hydration by enhancing the skin's ability to retain moisture.

When incorporating vitamin C into your skincare routine, it's important to choose a stable form of the vitamin, such as ascorbic acid, and use products with a concentration of around 10-20%. Additionally, it's best to store vitamin C products in opaque or dark containers to prevent degradation from light exposure. Start with a lower concentration if you have sensitive skin and gradually increase as tolerated. And always remember to use sunscreen during the day, as vitamin C can make your skin more sensitive to the sun.