- Thomas Gerrard MSC, BSC (Hons)
Technical Ruminant Sales Specialist, Phileo By Lesaffre GB
Monday 01 Jun 2026
One of the primary hurdles faced by beef producers is the disruption to rumen function that often accompanies the shift to a more energy-dense finishing ration. As the diet changes, the rumen microbiome must adapt to handle the rapid fermentation of starch and sugars, which can lead to a drop in rumen pH and the onset of acidosis. This disorder not only compromises feed efficiency and growth but also increases the risk of other health issues, such as lameness and liver abscesses.
Incorporating live yeast probiotics into your cattle feed can help to unlock a host of benefits. Feeding Actisaf® live yeast to beef cattle has been repeatedly proven to support the bugs that stabilise rumen pH, reduce build-up of lactic acid and increase fibre digestion. In turn, this prevents digestive upset, eases the transition onto finishing dets, reduces the risk of acidosis and loss of performance, and increases VFA (energy) release from feed – the key driver of live weight gain. Good rumen function supported by Actisaf® promotes efficient digestion, unlocking more from your forages and feed to support high levels of feed efficiency for enhanced performance.
Actisaf® has been found in several trials to improve feed efficiency in ruminants by stimulating the growth and activity of rumen microbes. In beef cattle, EU trials show that Actisaf® increases growth rates (DLWG) by up to 9%, increases feed conversion efficiency by up to 4.3% and improves carcass classification – all contributing to a more profitable and sustainable operation.
Actisaf® provides a simple yet powerful solution to support rumen function, animal health, and overall performance, helping producers navigate the road to success.
We recommend incorporating Actisaf® at a minimum rate of 1kg per tonne of feed for feed rates of 5-10kg or a recommended dose rate of 5-10g per head/day. Contact your CMC representative to discuss how Actisaf® can benefit your beef operation.