Nutrients · mg
Niacin (Vitamin B3)
Niacin supports energy metabolism, DNA repair, and skin health. The upper limit applies to supplemental forms, which can cause flushing.
How much you need
Values are for general adults and vary by age, sex, and life stage. S8D personalizes the exact target to your profile.
Where to get it
- Poultry & fish
- Peanuts
- Whole grains
- Fortified cereals
Common questions
How much Niacin (Vitamin B3) do adults need?
Most adults need 14 mg (women) / 16 mg (men) of Niacin (Vitamin B3) (measured in mg). The exact target depends on age, sex, and life stage — S8D personalizes it to your profile.
What is the tolerable upper limit for Niacin (Vitamin B3)?
The tolerable upper limit is 35 mg (from supplements/fortification). Staying under it avoids the risks of excess intake; S8D never builds a day that exceeds any nutrient's upper limit.
Which foods are high in Niacin (Vitamin B3)?
Good sources include Poultry & fish, Peanuts, Whole grains, Fortified cereals.
Why does Niacin (Vitamin B3) matter?
Niacin supports energy metabolism, DNA repair, and skin health. The upper limit applies to supplemental forms, which can cause flushing.