Horn Trommelen kritiserade mätmetoden.
"The indicator amino acid oxidation technique is actually not that good to base protein recommendation on. But I definitely agree with the overall message that higher protein intakes mostly have upside for athletes!
The best methods would be muscle protein synthesis measured by the precursor-product method and long-term studies measuring changes in muscle mass using CT, MRI, and/or fiber-type specific hypertrophy by histology. (and even those have strengths and weaknesses)
The indicator amino acid technique is not specific to muscle growth. Protein intake is anabolic to muscle, but at a certain point this effect appears to be maxed out. However, at that point protein is still anabolic to other tissues (however it can be questioned if anabolism in non-muscle tissues is even desired).
Basically IAAO is a whole-body technique, not a techique that is specific to muscle tissue. Although not specific to the IAAO, I've discussed the problem of whole-body vs muscle measurements in section 4.1 of my article here:
http://www.nutritiontactics.com/meas...ein-synthesis/
PS: I'll probably update that article to include the IAAO at some point."