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NASEM


Formulating for Better AA Efficiency

How to optimize milk protein yield, improve cost efficiency, and reduce nitrogen excretion? The answer: Balance dairy rations for essential amino acids (EAA) rather than their aggregate, metabolizable protein (MP). Canada’s Dr. Hélène Lapierre and U.S. researchers updated the NASEM 2021 guide to MP and EAA, which now recognizes requirements and “efficiency of utilization” of individual EAA.

Careful with Copper: More for Maintenance, Avoid Too Much in Lactation

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Careful with Copper: More for Maintenance, Avoid Too Much in Lactation. Dr. Weiss says that copper (Cu) supplementation warrants special attention. The main concern is the risk of liver toxicity resulting from over-supplementation in lactation diets.

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