The world of medicinal mushrooms is rife with companies making claims that are not supported by real scientific studies for the actual ingredients used. The ratings given for the products on this site are entirely based upon the (regulated) supplement facts label.

Our star ratings are based on the balance between pros vs. cons for each product. Product ratings are from 1-star (poor) to 5-stars (excellent).

Generally, the pros and cons to determine a rating can be summarized as follows:

  • Extracted vs. unextracted
  • Preferred vs. unproven extraction method
  • Bioavailable vs. unknown complex polysaccharides
  • Mushroom sourced beta-glucans vs. non-mushroom beta-glucans (i.e. yeast)
  • Therapeutically effective levels (percentages given) vs. uncertain component levels (i.e. ratios or other non-descript labeling practices)
  • Low/zero indigestible content vs. presence of indigestible content (i.e. chitin or fillers)

MMR is an independent team of volunteers, each with a long-standing interest and/or education in the therapeutic use of medicinal mushrooms. If you disagree with a rating given on this site, you are free to ignore it (please do not contact us because you are upset that a product receives an unfavorable review, as we do not control what the manufacturer puts in the product).