With little research and hardly anything known about myostatin at all, let alone now knowing proper doses or any possible side effects of such a drug I believe it is far too early to be making products containing substances claiming to inhibit myostatin, especially some of these exact companies are the ones claiming they know nothing about the gene they are trying to inhibit! Pinnacle claims the worst that can happen by using its product in such a premature stage is a small loss of a bit of money. I however believe that a gene altering drug in it's infancy stages should not be taken by anyone who is unwilling to be a human guinea pig.
The current black market use of SARMs (before clinical trials are done, phase 3 clinical trials not started) via online purchase and the online sale of fake myostatin inhibitors and fake SARMs shows the massive demand that will be there for the real thing. Especially after they do clear clinical trials for Muscle wasting diseases. I expect to be having some type of myostatin inhibitor treatment within ten years. Maintain muscles before getting too hold and maintaining as I get older, less risk of falling and breaking a hip later, heart health, weight control. do not care about the sports aspect. The real sports competitors will doing this and ten other riskier things. I had LASIK done over ten years ago and have not regretted it. Was able to get 20-15 vision (so better than the old good vision standard of 20-20).
In 2016 conflicting reviews from different research teams were published concerning the effects of GDF11 on skeletal and cardiac muscle.   One of the reviews reported an anti- hypertrophic effect in aging mice,  but the other team denied that cardiac hypertrophy occurs in old mice, asserting that GDF11 causes muscle wasting.  Both teams agreed that whether GDF11 increases or decreases with age had not been established.   A 2017 study found that super-physiological levels of GDF11 induced muscle wasting in the skeletal muscle of mice.