Niacinamide vs Vitamin C: Which One First?

Both niacinamide and vitamin C can improve tone and brightness. Many modern formulas are stable together, but sensitive skin may still prefer separating them.

A simple approach: vitamin C in the morning, niacinamide at night. Always patch test and add one new active at a time.

If irritation appears, reduce frequency and reinforce your routine with a calming moisturizer.