There is no study proving that poria mushroom has nephrotoxicity. Poria has the effect of diuresis (promoting the flow of water to dispel dampness), poria is commonly used in the treatment of gonorrhea, edema, diarrhea, dysuria, dyspareunia and other diseases. Poria is the dried fungus of Poria, family Polyporaceae, which belongs to the water-relieving and dampness-expelling medicines in the water-relieving and edema-eliminating medicines (to relieve urination and eliminate edema). Poria enters the bladder meridian and kidney meridian. Poria is sweet, light and flat in nature. Poria has the effect of inducing diuresis and seeping dampness, and is used to treat gonorrhea, edema, diarrhea, dysuria, dyspareunia and other conditions. The adverse effects of poria are not clear, and this product is prohibited for those without water-dampness to avoid injury to yin. If you need this product, please use it under the guidance of professional Chinese medicine practitioners.