Thiamin (B1)Nutrition library
Thiamin (B1)
Thiamin supports energy metabolism and nervous-system function — needs rise slightly in pregnancy.
Trimester focus
| Stage | For the mother | For the baby |
|---|---|---|
| First trimester | RDA 1.4 mg/day; whole grains, pork and legumes are reliable sources. | Supports early neural-tube and limb-bud energy demands. |
| Second trimester | Increased metabolic rate raises turnover — spread intake across meals. | Contributes to placental and fetal tissue metabolism. |
| Third trimester | Deficiency is rare with varied diets but worth monitoring if nausea limits grains. | Continues supporting rapid fetal growth. |