INGREDIENTS
Niacin: every form, compared
How the forms of niacin differ, and how much to take.
apiece offers 2 forms of niacin. Each is listed with the amount a formula usually includes.
- Niacinamide
Niacinamide is a non-flushing form of vitamin B3 that supports energy metabolism and healthy skin. Usual amount: 30 mg.
- Nicotinic acid
Nicotinic acid is a form of vitamin B3 that supports energy metabolism. Usual amount: 25 mg.
- Recommended intake
- 14 mg (women), 16 mg (men)
- Upper limit
- 35 mg a day from supplements and fortified foods
- Reference
- NIH ODS: Niacin fact sheet
Questions
Which form of niacin is best?
It depends on what you want it for and how your body handles it. The forms differ in how much niacin they carry, how they feel on the stomach and how much capsule space they take. apiece uses niacinamide by default and lets you choose another form.
How much niacin is too much?
The adult upper limit is 35 mg a day from supplements and fortified foods. Count every source, including multivitamins.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This page is general information, not medical advice. Check with your doctor or pharmacist before starting a supplement, especially if you take medication, are pregnant or nursing, or have a health condition. Updated 2026-10-21.