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Vitamin B3 (niacin)
Full ranking Dose tool Products (4,910)
Key facts
Daily Value (US FDA)16 mg
Tolerable Upper Intake Level (UL)35 mg
Median（Per day）20 mgP5 3.3 – P95 200
Products4,910
Sources: https://ods.od.nih.gov/factsheets/Niacin-HealthProfessional/ · FDA DV 16 mg (https://www.fda.gov/food/nutrition-facts-label/daily-value-nutrition-and-supplement-facts-labels); pre-2016 DV [20] (https://www.federalregister.gov/documents/2016/05/27/2016-11867/food-labeling-revision-of-the-nutrition-and-supplement-facts-labels); adult UL 35 mg; hard_high=3000 per serving (UL x10 or market maximum), hard_low=DV/1000
Daily dose across products（mg/day）
DV 16
UL 35
0.67 mglog scale · n=4,9101,000 mg
Label data from official national databases and brand websites, as declared; not lab-verified.
Common forms
| Form | Products | Median | P5–P95 | Elemental fraction |
|---|---|---|---|---|
| Niacinamide (nicotinamide) | 3305 | 20 mg | 5 – 150 | — |
| Nicotinic acid | 315 | 25 mg | 3.75 – 500 | — |
| Inositol hexanicotinate | 186 | 100 mg | 0.8 – 640 | — |
Top ranked
| Rank | Brand | Product | Per day | Score |
|---|---|---|---|---|
| 1 | Capwork Health Inc. | Total Natural Niacin | 10 mg | 54.0 |
| 1 | Prestige Nutrition Inc. | Vitamin B3 | 10 mg | 54.0 |
| 3 | Solaray | Niacin 100 mg | 100 mg | 45.0 |
| 3 | Swanson | Niacin 500 mg | 500 mg | 45.0 |
| 5 | Nature's Way | Niacin 100 mg | 100 mg | 42.0 |
For information only; not medical advice. Talk to a doctor or pharmacist before starting or stopping any supplement.