Fun fact, rHGH “IU” isn’t a weight measurement, it’s a measurement of potency. The international standard is 3iu of growth hormone activity per mg of rHGH, but no one actually tests for that on UGL samples. They just assume it is and multiply the milligrams by 3 to get the IU.
It could actually be 1IU or 4IU per mg depending on quality. Thats probably why the “same dose” of one brand causes worse side effects, like water retention, than another. The one causing side effects is actually just more potent. (Assuming we’re talking about normal rHGH side effects commonly experienced when the dose is high).
I’ve seen tests of pharma produced rHGH as high as 4.4IU / mg, though that would be considered a manufacturing failure since it exceeds the FDA standard of 3IU by more than the allowed 10% deviation.