I think that if a person is willing to undergo such experiments than they should be able to. However, I also believe that a person should have a stable mental health as to ensure that they are agreeing to such experiments conscientiously.
In order to answer this question, one has to delve into the theory of free will vs. one’s objective best interest. Although we can try to alter someone’s choices, it will always come back to whether or not the person wants to.
It is a definite that humans can be experimented on but it doesn’t mean they should be.