But if enough people say in this thread they really want me to post studies to support use of Phenibut for MCAS then I'll do it.
As Gingergrrl and I have noted, we have seen nothing to justify the claim that phenibut is a mast cell stabilizer. You seem to be saying you haven't with her, but think it does in your case, which is helpful for you. But why? Do you have some specific genetics or antibody that causes you to respond in such a way?
As I mentioned, I took phenibut for a limited time, also, and it did help my sleep which my doctor prescribed it for, but I got off it as soon as I could as I was aware of the risks. And, I didn't feel any positive MCAS effects.
If there is any research justifying its use for MCAS, it would be great if you could point us all to it.