I have had problems with some types of mushrooms over the years, and have learned to mostly avoid them. However, on the advice of a naturopath I was working with several years ago, I decided to try some single and combination mushroom products, and in particular I decided to try Mycophyto Complex from Advanced Bionutritionals because of my experience with a number of your other products. I have only taken a single Mycophyto Complex capsule in the morning of several days: I am both excited about a general boost - which is generally what I have read about and looked for, but also a strong allergic reaction on my back and neck. I plan to retest soon, and hope to figure out how to use the product without getting a negative response, but still get the benefits, but will request my money back if I continue to have the negative response.