Does anyone here have any clinical research studies about marijuana and helping minor turrets syndrome? or nervousness and ticking?

My little brother suffers from nervous ticks and minor turrets from what i believe leads back to my parents divorce. He is 15 years old turning 16 in less than a month and i have tried to talk to him about the benefits of marijuana and how i KNOW it will help him but he has been brainwashed by society and never wants the touch cannabis. so please, anything, will help.

thank you and toke on

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First grow, good advice always needed