Across 3 review studies, all reported beneficial moderate-sized effects on growth performance in animals (poultry, swine, ruminants, etc.). No dose or duration data available.
Caveats: Evidence base is small (only 3 studies) and all are reviews without primary data — conclusions should be considered preliminary. No statistically significant findings are reported. Available evidence is overwhelmingly positive — clinical literature in this area is subject to publication bias (null-result studies are less likely to be published or indexed).
The integration of postbiotics into animal feed improves growth performance, feed conversion ratios, and disease resistance in animals
Saccharomyces cerevisiae fermentate has been reported as an alternative to antibiotics in livestock production, with studies noting improvements in feed-to-weight ratio, meat quality and overall health of livestock.
The intestinal microbiota has gained increased attention ... due to its role in promoting intestinal maturation, immune system modulation, and consequently the enhancement of the health and growth performance of the host.