Why can’t you use vitamin C and niacinamide together?

Vitamin C and niacinamide can’t be used together because they can cause a reaction that can lead to skin irritation. When used together, the two compounds can form a compound called nicotinic acid, which can cause redness, itching, and burning sensations. It’s best to use them separately.

What goes first vitamin C or niacinamide?

Generally speaking, vitamin C should be applied to the skin before niacinamide. Vitamin C is an antioxidant that can help protect and brighten the skin, while niacinamide is a form of vitamin B3 that can help reduce redness, improve the skin’s barrier function, and reduce the appearance of wrinkles. Applying vitamin C first will help ensure that it is properly absorbed into the skin, while applying niacinamide first will ensure that it is not degraded by the vitamin C.