Vitamin C vs Niacinamide: Which Serum Should You Buy First?

The quick answer

Niacinamide is usually the easier first serum because it is stable, affordable, and fits many routines. Vitamin C can be excellent for a brightening-focused routine, but packaging, formula stability, and sensitivity matter more.

Choose niacinamide if

You want a low-cost, low-drama routine step and your skin gets visibly oily or uneven.

Choose vitamin C if

You want an antioxidant-focused morning step and you already tolerate your cleanser, moisturizer, and sunscreen consistently.