Niacin (B3, NE)Nutrition library
Niacin (B3, NE)
Niacin (as niacin equivalents) supports energy metabolism and placental function — upper limit applies mainly to supplemental nicotinic acid.
Trimester focus
| Stage | For the mother | For the baby |
|---|---|---|
| First trimester | RDA 18 mg NE/day; poultry, fish and whole grains contribute. | Supports early cell division and energy metabolism. |
| Second trimester | Needs stay elevated through mid-pregnancy. | Placental transfer supports fetal growth. |
| Third trimester | Food sources rarely approach the 35 mg supplemental UL. | Continues as a general metabolic cofactor. |
Target note
UL 35 mg applies to supplemental nicotinic acid, not typical food niacin.