Vitamin B3 Nicotinamide Powder (Flush Free Niacin) Niacinamide Anti Inflammatory
Dosage Doses ofVitamin B3 Powder vary depending on varying factors such as the user’s age and gender. Doses range from 1mg-35mg. The RDA for Vitamin B3 is 1.4mg. Vitamin B3 Usage, Dosage and Side Effects.