Ich halte das ehrlichgesagt ganz und garnicht für lächerlich, denn das abgebaute Protein wird schließlich teilweise wieder Rückresorbiert
Die Aussage ist zwar richtig, kratzt aber nur oberflächlich an der Komplexität des menschlichen Proteinstoffwechsels.


Ein Nachtrag aus der Praxis:
Int J Sport Nutr Exerc Metab. 2001 Sep;11(3):349-64.

The effect of whey protein supplementation with and without creatine monohydrate combined with resistance training on lean tissue mass and muscle strength.

Burke DG, Chilibeck PD, Davidson KS, Candow DG, Farthing J, Smith-Palmer T.

Department of Human Kinetics, St. Francis Xavier University, Antigonish, Nova Scotia, B2G 2W5, Canada.

Our purpose was to assess muscular adaptations during 6 weeks of resistance training in 36 males randomly assigned to supplementation with whey protein (W; 1.2 g/kg/day), whey protein and creatine monohydrate (WC; 0.1 g/kg/day), or placebo (P; 1.2 g/kg/day maltodextrin). Measures included lean tissue mass by dual energy x-ray absorptiometry, bench press and squat strength (1-repetition maximum), and knee extension/flexion peak torque. Lean tissue mass increased to a greater extent with training in WC compared to the other groups, and in the W compared to the P group (p < .05). Bench press strength increased to a greater extent for WC compared to W and P (p < .05). Knee extension peak torque increased with training for WC and W (p < .05), but not for P. All other measures increased to a similar extent across groups. Continued training without supplementation for an additional 6 weeks resulted in maintenance of strength and lean tissue mass in all groups. Males that supplemented with whey protein while resistance training demonstrated greater improvement in knee extension peak torque and lean tissue mass than males engaged in training alone. Males that supplemented with a combination of whey protein and creatine had greater increases in lean tissue mass and bench press than those who supplemented with only whey protein or placebo. However, not all strength measures were improved with supplementation, since subjects who supplemented with creatine and/or whey protein had similar increases in squat strength and knee flexion peak torque compared to subjects who received placebo.
Übrigens:
Ich kann mir nicht vorstellen, dass die BBler der frühen Jahre auf soetwas zurückgreifen konnten.
Ich weiß zwar nicht, wann die ersten Proteinsupplemente auf den Markt kamen - Fakt ist aber, dass auch die BB`s der frühen Jahre eine überdurchschnittlich hohe Proteinzufuhr für wichtig hielten.