For animals rumen protected methionine and choline
IMPORTANCE OF METHIONINE AND CHOLINE SUPPLY IN THE FEEDING OF HIGH YIELDING DAIRY COWS
Choline plays a central role in the metabolism of fats, as it is one of the activators of the fats effusing from the liver. The non-protected choline dissolves in the rumen, therefore in case of the dairy cows it is practical to feed in a protected form. The protected choline improves the milk-productivity of cows and it also ensures protection against fatty-liver syndrome.
Methionine is one of the most important essential amino acids to dairy cows, especially in case of the corn-soybean meal based diet. Methionine must be provided for the cows in a rumen-protected form as well, because the rumen-microbes also dissolve the methionine. As a result of the protected (bypass) methionine supplementation, the production of the cows increases and it also has a role in preventing certain metabolic diseases (e.g.: ketosis). Feeding bypass methionine improves the protein content of milk and the amount of protein produced with the daily milk.