Suffering from RCVS due to lions mane

I’m suffering now for over 5 months I feel shit I can’t use my brain properly because of lions mane I’m afraid I have brain damage since the RCVS is chronic will this help me get my brain back to a normal state again? I heard that Russo a YouTuber who suffered from lions mane used Cerebrolysin

Where can I get good quality cereb and why is it so expensive