B there for baby: How B12 and Bifidobacterium shape healthy beginnings.

Richie, Tanner G; Cowardin, Carrie A · Cell Metab · 2026

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Abstract

Vitamin B12 deficiency is common among pregnant and lactating women and is linked to adverse birth outcomes and offspring obesity. In this issue of Cell Metabolism, Liu et al. examine how maternal B12 deficiency mediates these effects through reduced abundance of Bifidobacterium pseudolongum.

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