How do I know if the product contains beneficial ingredients that are bioavailable/usable?
The majority of medicinal mushrooms are known for their active polysaccharides, called beta-D-glucans. Some mushrooms like Reishi also have triterpenoid compounds.
Take note of whether these compounds are listed and quantified. If they are, make sure the company can support this claim with actual testing documentation. Some companies list multiple “active” compounds without any actual testing results.
Don’t be fooled by high polysaccharide numbers. Polysaccharides can simply be starch, which is an alpha glucan and a major component of grain. Grain is commonly found in mycelium products.