I took this stuff as well as reishi in large amounts and didn't notice anything (these herbs were taken in seperate periods). This stuff was New Chapter brand; the reishi was Dragon Herbs brand. That being said, I'm open to herbs, but herbalists do work ups on people and recommend specific combinations. It's not one size fits all. I've begun scanning a book on herbs (also goes into nutrition and chakras and stuff) that was released recently. If anybody wants a copy, PM me.