Asked July 20, 2013, 4:22 AM EDT

explain the term by-pass protein

Outside United States

1 Response

By-pass protein - is used to describe dietary protein, since we are feeding the microbes of the cow. Remember we feed the microbes not to cow! when microbes digest the feed they derive energy for their growth and maintenance while producing Volatile fatty acids for the energy needs of the host animal (the cow). Since it is inefficient to feed an animal natural protein. So the microbes with in the rumen have the ability to utilize compounds such as urea to provide nitrogen for the synthesis of microbial protein, when dietary protein is less digestible to them. So this is where by-pass protein comes into play, as either by some means a feed that has been altered or because the type of protein, is resistant to degradation by the rumen microbes. The undigested dietary protein would essentially "bypass" the rumen and would potentially be available to meet the protein needs of the host animal (the cow) after digestion in the small intestine. Thus in short it is protein the bypasses the rumen and not taken up by the rumen microbes and passes to the small intestine to be utilize by the cow in the small intestine. There are a lot of good published articles about bypass proteins in the Journal of Dairy Science website. Please feel free to contact me for additional information.