Pioneering the Science of Rumen Health

What Is Mega e?

Mega e (Megasphaera elsdenii) is a rumen-native bacteria cattle rely on to digest high-energy diets. While other rumen microorganisms consume amino acids and sugars first, Mega e prefers lactic acid as its energy source. As Mega e targets lactic acid in the rumen, it produces beneficial volatile fatty acids, such as butyric and propionic acids. Mega e contributes to the development and maintenance of a healthy rumen and the regulation of rumen pH. Click to learn more about Mega e's mode of action.

How Does Mega e Work?

With traditional feed transitions, naturally occurring Mega e in the rumen of cattle takes weeks to reach populations required to effectively handle concentrated grain-based diets. As animals transition to higher-concentrate feed, lactic acid may accumulate in the rumen if Megasphaera levels are not sufficient. If lactic acid builds up, the rumen’s natural pH balance can become too acidic and health issues can result — from acidosis to rumen damage to weight loss, bloating and more. In calves with immature rumens, Mega e works to improve rumen structure and contributes to the growth of rumen papillae, which absorb nutrients.