This is a hot water extract of wild harvested Turkey Tail mushrooms. It contains a minimum of 15% mushroom beta glucans.   • EXTRACT IN POWDER FORM (NOT A TINCTURE, WHICH ARE 85%+ SOLVENT)   • WILD HARVESTED  • NO MYCELIA OR BIOMASS USED  • 15:1 CONCENTRATION, STANDARDIZED AMOUNTS OF ACTIVES  We perform third party heavy metals testing. All of our products meet the strictest standards in the food industry, Mike Adams lowheavymetalsverified.org. (1mg/kg=1ppm).