Restoring Psi

[bushwhacker2k]

I'm under the impression that I'm missing something about Psi.

I used Psi abilities twice and my Psi-meter hasn't refilled since then.

Is there some way to, like healing, have someone/something auto-restore it?

Or do they sell large quantities of the psi-restoring items and I just haven't noticed?

P.S. I'm in the demo if that affects anything.

[UnLimiTeD]

It affects a lot, yes.
PSI doesn't refill, to my knowledge.
Not sure if it has a 95%+ mechanic like health.
You can use boosters, and craft them from shrooms.
In the current version(not sure about Demo) there's the shroomhead feat, that allows PSI to regen to 40% by standing next to mushrooms.
Insanely strong feat.