How do we know how effective protein powders are?

The actual effectiveness of biological proteins has long interested scientists. There are many ways to compare the “goodness” of two sources of protein, but one of the most spectacular methods is called PER (Protein Efficiency Ratio). It has been used since 1919, and is the officially approved method in several countries (eg. Canada) to this day. The PER value shows how much 1kg of protein intake increased the weight of test subjects! Interesting, right? Finally, a data that quantifies your improvement. Unfortunately, the test subjects are not humans, but young animals (like calves) and the test is done with strict dietary factors (15% protein content diet). So, while the PER method does not show our own future per se, however, it still offers some very valuable information on the bioavailability of proteins. The PER value of useful and effective protein powders are above 2.5, which means that by taking 1 kg of such a protein, the subject gains 2.5 kgs of body mass (not dry muscles).

So, how effective the various protein powders are? Stay tuned…