Review synthesizes how nutrition affects brown adipose tissue in neonatal ruminants

This narrative review focuses on brown adipose tissue (BAT) dynamics in neonatal ruminants. The scope covers developmental patterns, distribution, and functional roles of BAT in this population. The authors describe how BAT is abundant at birth and declines with age, showing whitening over time. Distribution at birth is mainly in the neck, shoulder, perirenal region, and around the heart. Functionally, BAT is essential for neonatal ruminants to maintain body temperature and survive postnatal cold stress through non-shivering thermogenesis.

The review synthesizes evidence on nutritional regulation effects. Fatty acids, carnitine, vitamins, and minerals modulate thermogenic activity through effects on mitochondrial function, lipid metabolism, and key signaling pathways such as UCP1, PGC-1 alpha, and PPAR gamma. The authors argue that targeted nutritional strategies can enhance BAT function. This enhancement may improve neonatal cold tolerance, survival, and early growth performance. The text does not report specific adverse events, discontinuations, or tolerability data.

The authors highlight the use of multi-omics technologies as a promising future direction to decipher BAT regulatory networks and guide precise nutritional interventions. This review does not provide pooled effect sizes or p-values. The findings are presented as qualitative conclusions drawn from existing literature rather than primary trial data. Practice relevance is framed around potential future applications of nutritional strategies.