Vitamin B3 is a moderate-risk supplementwith an RDA of 16 mg and a safe upper limit (UL) of 35 mg per day according to FDA standards. CNS lists a RDA of 15 mg with the same UL. Use NutriAudit to check if your supplement stack keeps this ingredient within safe limits.
Vitamin B3 sits in the B Vitamins category. This page consolidates 4 regional standards, and the limits vary enough that you should not treat one region's rule as universal.
For this ingredient, the main task is usually not a binary yes/no question but checking the label dose, your total intake, and possible overlap with the rest of the stack.
High-dose vitamin B3 (niacin) can cause flushing and liver stress.
| Region | Organization | RDA | Upper Limit (UL) | Unit |
|---|---|---|---|---|
| 🇺🇸 United States | FDA | 16 | 35 | mg |
| 🇪🇺 Europe | EFSA | 16 | 35 | mg |
| 🇦🇺 Australia | TGA | 16 | 35 | mg |
| 🇨🇳 China | CNS | 15 | 35 | mg |
RDA = Recommended Daily Allowance (adequate intake for most adults). UL = Tolerable Upper Intake Level (maximum safe daily amount).
First match your product label against the dose table above, then check whether the known interaction list includes anything in your current stack.
If you are taking multiple supplements, the safest approach is usually to audit the whole stack instead of judging a single bottle in isolation.
The safe upper limit (UL) for Vitamin B3 is 35mg per day according to FDA. Exceeding this amount regularly may increase the risk of adverse effects.
The RDA for Vitamin B3 is 16mg per day for most adults. This amount is sufficient to meet the needs of 97-98% of healthy individuals.
Check if your supplement stack keeps Vitamin B3 within safe limits.
Audit My SupplementsDisclaimer: NutriAudit is a decision-support tool designed to help you review your supplement stack for potential duplicate, conflicting, or excessive ingredients. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making changes to your supplement routine, especially if you are pregnant, nursing, taking medications, or have a medical condition.
Based on reference standards from FDA, EFSA, TGA, and MHLW.