Both vitamin C and niacinamide have their own unique benefits for the skin. Vitamin C is a powerful antioxidant that helps to protect the skin from free radicals and environmental damage. It also helps to brighten the skin, promote collagen production, and reduce the appearance of hyperpigmentation. On the other hand, niacinamide can help to regulate oil production, improve skin texture, and reduce the appearance of blemishes. The choice between the two ultimately depends on your specific skincare concerns and goals.