First report:
So far I've been injecting approximately 50 nanograms per day. I find its effects positive so far, but this is probably because I've been in serious shortage having remarkably low natural levels of GDF-11 remaining at my age. It is hard to know what is a placebo effect and what is actually biologically happening. At least I feel a bit younger, so that's a perceived positive benefit. Until I notice it feels like too much, I won't immediately reduce the dosage. If I notice something unpleasant, I will bring it down to 20 nanograms and see how that works out.
A younger member here in his forties said that when he took it some time ago, that it produced no noticable effects. I think it probably helps to bring older people up to the norm of GDF-11 presence for someone young, before dialing back to a maintenance dose that keeps them at that level over time. That maintenance dosage has been recommended to be somewhere between 2 and 5 nanograms per day. However, patient zero Steve Perry has reduced his intake after years of use to only 0.5 nanograms per day. FWIW.
DareDevil