Actisaf® live yeast is proven to optimise performance in dairy cows by supporting the growth of beneficial rumen microbes that enhance digestion of feed and stabilise rumen pH. Through this dual mode of action, Actisaf® improves feed efficiency and drives milk and milk solids production, while also supporting cows through diet and housing changes. In young calves, it also promotes early rumen development, stabilises rumen pH and enhances fibre digestion which are critically important for future performance

Actisaf^® has a significant impact on feed efficiency and fibre digestibility in dairy cows, even as forage varies or grass quality declines.

By stabilising the rumen environment, Actisaf^® supports key fibre-digesting microbes, such as Fibrobacter succinogenes, which enhances the cow’s ability to extract energy from forage. This microbial support leads to improved neutral detergent fibre (NDF) digestibility by over 6% and a 5% increase in overall feed efficiency, as shown in a University of Nottingham study.

Research shows that supplementation with Actisaf^® increases the population of rumen microbes identified in efficient animals, such as Megasphaera elsdenii, which converts lactic acid into propionate, and Fibrobacter succinogens, a key microbe involved in fibre digestion.

These improvements translate directly into better milk yields without increasing dry matter intake (DMI) with cows producing more milk from the same amount of feed, helping reduce the cost of production per litre and supporting sustainability. Importantly, these gains do not come at the expense of cows' body condition score, fertility or health parameters, confirming that performance improvements are due to better feed efficiency.