High-yielding dairy cows are often lacking in the amino acids methionine and lysine. These are supplied through microbial protein and rumen-undegradable protein from feedstuffs, but not in sufficient amounts to cover the requirement. Increasing the protein carrier use can reduce the lack, but this is inefficient. With BEWI-FATRIX® LM 101 we offer a further developed product to easily add both amino acids in a rumen-protected shape to not only enable the supply of both amino acids but also to ensure an optimal amino acid supply with reduced protein carrier use. This improves the efficiency in milk production. Additional, not required protein is not beneficial from health or economical issues. Feeding both amino acids in optimal doses in a rumen-protected shape is relevant not to be degraded in the rumen to allow the metabolic use. With this the nitrogen efficiency and the milk yield can be improved, by feeding only one product: BEWI-FATRIX® LM 101.