Follow the usage directions for the specific niacinamide serum you're using. Some formulas may be used once or twice daily depending on the product and your routine.

No. Alltimate Niacinamide 10% Serum is formulated with niacinamide as its lead active at a stated concentration. Other serums on this page include niacinamide as part of a different lead formula, such as White Seed or Vitamin C. Check each product's ingredient list for specifics.

Many routines layer more than one serum, applied from thinnest to thickest texture. If you're combining actives for the first time, introduce one at a time and check individual product guidance.

Niacinamide serums are often considered for oily or combination skin routines. See our Serum for Oily Skin and Serum for Acne-Prone Skin collections for more options.

A serum is a lighter, treatment-step texture applied before moisturizer. See our Niacinamide Moisturizers collection if you're looking for that step instead.