This mushroom tincture is well researched for improving neural and cognitive functioning. Produced in Maine.

Research links:

https://pubmed.ncbi.nlm.nih.gov/14977447/

https://pubmed.ncbi.nlm.nih.gov/24266378/

https://www.verywellmind.com/the-benefits-of-lions-mane-89474#:~:text=Lion%27s%20mane%20may%20benefit%20older%20adults%20with%20mild,or%20a%20placebo%20every%20day%20for%2016%20weeks.