8/28/2023 0 Comments Hilmar skim milk powder plantDeficiencies of many EAA, but particularly lysine and methionine, are important. The average concentration of each essential AA ( EAA) in the CMR protein ingredients from Tables 1 to 5 are shown. The differences among protein sources in AA is shown clearly in Figure 1. The values are expressed as grams of AA per 100 grams of CP to account for differences in processing of various ingredients – for example, soy flour and soy protein concentrate have different absolute AA profiles, but when expressed as a percent of CP, the values are similar and reflect the AA profile of the protein. Tables 1 to 5 include milk, whey, soy, pea, and wheat protein AA profiles, respectively. Using a simple review of published literature – peer reviewed and non-peer reviewed, I compiled some examples of reported AA profiles in several ingredients used in CMR formulas around the world. Indeed, many manufacturers of calf milk replacers ( CMR) use the milk AA profile as their template for AA. Whole milk is often considered an “optimal” nutrient source for calves, with an excellent AA profile that meets the AA needs for maintenance and growth. This Calf Note will review AA composition of ingredients that make up CMR and the AA composition of whole milk. This transition period causes changes in the source of amino acids – i.e., early in life amino acids come exclusively from milk protein, but by a few weeks after weaning, the calf’s amino acid supply is provided by a mix of undegraded dietary and microbial protein flowing from the rumen. In Calf Note #238, I discussed the complexity of predicting amino acid ( AA) supply in young calves, particularly during the period (usually around weaning) when calves transition from monogastric digestion to ruminant fermentation and digestion.
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