As for this invention, the ratio for the casein of the milk serum protein, the range under approximately 50:50, regards the milk serum protein product which entire protein content with dry quantitative standard at least approximately 20%, protein content approximately 8 weight % has from approximately 2.5 a on the basis of the weight of the product from approximately 25:75. The product has profitable amino acid composition, it is ideal in the especially contestant. It regards also the manner in order this invention uses precision percolation and ultrafiltration, to produce the milk serum protein product. The milk serum protein product from the ultrafiltration retaining solution and the casein content material, at 20% entire protein content, consists of ratio and the dry quantitative standard for the casein of the milk serum protein under approximately 50:50 from approximately 20:80 at least本発明は、乳清タンパク質のカゼインに対する比が、約25:75から約50:50未満の範囲、総タンパク質含量が乾量基準で少なくとも約20%、タンパク質含量が製品の重量を基にして約2.5から約8重量%を有する乳清タンパク質製品に関する。製品は、有利なアミノ酸組成を有し、特に競技者に好適である。本発明は精密ろ過および限外ろ過を用いる、乳清タンパク質製品を製造するための方法にも関する。乳清タンパク質製品は限外ろ過保持液およびカゼイン含有素材から、約20:80から約50:50未満の乳清タンパク質のカゼインに対する比および乾量基準で少なくとも20%の総タンパク質含量にて、構成される
