@Ghoul if you are unbanned can you make your argument against the points above. Not finding the studies you mentioned on this.
I'm certainly not suggesting it's risk free. Given it's widespread, and relatively long period of use I'm not seeing any evidence it's highly dangerous either though. I've only seen a couple of cases of documented harms, and those were connected with really heavy use.
It's close relative PT-141 passed muster with the FDA which again, while no guarantee of MT-II safety, is another point in its favor.
The problem with MT-II, unlike PT-141, is that the patent expired prior to an attempt to commercialize it. If you read the history this didn't happen because it was abandoned like GW-50516, but because of convoluted business dealings and protracted court cases that went on for years fighting over who owned what. Without this patent protection, there's no financial incentive to fund full on clinical trials.
Most of the effects related to the brain involve the MC4 receptor, which MT-II activates. This declines with age. Studies in animals show neuroprotection and neurogensis, as well as enhanced intelligence with melanocortin agnonists.
Brain G-protein coupled receptors have been hypothesized to be potential targets for maintaining or restoring cognitive function in normal aged individuals or in patients with neurodegenerative disease. A number of recent reports suggest that ...
pmc.ncbi.nlm.nih.gov
We previously reported that melanocortins induce neuroprotection in experimental acute and chronic neurodegenerative conditions, including Alzheimer׳s…
www.sciencedirect.com
It's said to lower appetite via MC4 activation, and I've definitely experienced all of the effects in the animal study below, which are pleasurable, and immediately reminded me of what I felt in my teens and very early twenties. In my experience the "muscle stiffness" isn't cramping, but more of a "light on your feet" kind of feeling. The ability to activate muscle with less effort. I don't know if it's related, but walking pace is often used to gauge biological aging in males, and that last effect increases my walking pace, as reported by my fitness tracker:
Activation of MC4R pathway has also been associated with several non-feeding related activities, including increased yawning, muscular stiffness, stretching, and penile erections
In this work we summarize our understanding of melanocortin 4 receptor (MC4R) pathway activation, aiming to define a safe and effective therapeutic targeting strategy for the MC4R. Delineation of cellular MC4R pathways has provided evidence for ...
pmc.ncbi.nlm.nih.gov