well i personally think this holistic "doctor" is quite dangerous and someone should be looking into what they are saying.
that's just me tho, i find they will tell you anything to sell you something and saying mental illness isnt real because to him you don't look mentally ill is highly offensive.
how does one look mentally ill??
people can't tell i have problems when i talk to them but they are very real and medication (anti psychotics) have helped me greatly.
Go with your gut but in my opinion these people tend to claim all sorts of wonderful things and 9 times out of 10 its just the placebo effect .
anyway i wish you well and hope you find some answers