VitaminNo.004
Vitamin B3 (Niacin)
Energy metabolism, cholesterol (high-dose).
Typical / RDA14–16 mg
Upper limit35 mg*
EvidenceModerate
How to take it
Timing With a mealFood YesForm Niacinamide / nicotinic acid
What to know
*UL applies to supplemental nicotinic acid. High doses cause skin flushing and, chronically, can stress the liver. Prescription-level niacin for cholesterol is a different, supervised use.
Interactions & cautions
- High-dose nicotinic acid can affect the liver and blood sugar.
Do you actually need it?
Diet covers basics; high doses are a medical decision, not a casual add.
Reference values: NIH Office of Dietary Supplements, adult general population. Educational information only — not medical advice. Confirm with a healthcare professional.