Meta-analysis of the effects of dietary interventions to alleviate heat stress in lactating dairy cows.

A recent meta-analysis conducted a systematic evaluation of dietary interventions tested in lactating dairy cows under heat stress conditions. Drawing on a large body of peer‑reviewed studies (53 studies included in the analysis), the authors quantify the effects of different approaches on cow performance, physiology, and thermoregulatory responses. They concluded that live yeasts (Saccharomyces cerevisiae) showed the most consistent outcomes, increasing milk yield by +5.70%, exceeding the average response observed for other yeast derivatives or additive classes.

By Irawan A., Azmi A.F.M., Rahman M.A. et al.