SodiumNutrition library
Sodium
Key electrolyte for fluid balance, nerve signals and blood pressure; excess sodium (mostly from processed foods) is far more common than deficiency and can skew the important sodium-to-potassium ratio.
Trimester focus
| Stage | For the mother | For the baby |
|---|---|---|
| First trimester | Supports early fluid volume shifts with little change in requirement. | Helps maintain the early extracellular fluid and electrolyte milieu for cell function. |
| Second trimester | Modest increase tied to expanding blood volume; excess can contribute to swelling or elevated pressure. | Placental transfer supports fetal fluid balance and tissue growth. |
| Third trimester | Relevant for blood-pressure control under peak load; high Na relative to K is a common dietary pattern to watch. | Maternal status influences amniotic fluid volume in late gestation. |
Target note
Aim for balance rather than strict minimum. Whole foods (vegetables, fruit, dairy, meat) provide natural sodium; reduce ultra-processed items, canned soups and salty snacks if intake is high. The Na:K ratio (see balance panel) is usually more informative than sodium in isolation. Pregnancy fluid-volume expansion in T2/T3 makes electrolyte balance — not isolated sodium minimums — the clinical focus; excess sodium relative to potassium may contribute to swelling or elevated blood pressure.