Most common for daily maintenance. Brands like NOW Foods offer 500mg niacinamide doses.
Walmart and Target carry both oral supplements and topical serums.
iHerb is a top-rated merchant for a wide range of brands like Life Extension .
Niacinamide is a staple in skincare for minimizing pores and fading dark spots.
Slo-Niacin provides sustained release to minimize side effects.