Here’s one:
Improving effects of the mushroom Yamabushitake (Hericium erinaceus) on mild cognitive impairment: a double-blind placebo-controlled clinical trial
https://pubmed.ncbi.nlm.nih.gov/18844328/
300 mg per day!
How much in a fake pill? you have no idea. It is mostly filler.
Probably take a hundred or more pills a day to get that.
“The Yamabushitake group’s scores increased with the duration of intake, but at week 4 after the termination of the 16 weeks intake, the scores decreased significantly.”
No data, just a statement. Scores increased but then decreased SIGNIFICANTLY!
That one word concerns me.