True and false Poria can be identified from the morphology, color and other perspectives. Such as real Poria, the surface white or off-white, sometimes the edge of the yellow-brown, rough cross-section, powdery, smell the gas micro, mouth taste taste light, chewing the sticky teeth, drops of dilute iodine solution without obvious color changes; false Poria visible surface color is slightly uneven, the mouth tastes slightly sweet, take a little powder drops of dilute iodine solution becomes light blue. The complete true Poria was spherical, oblate or irregular block, size varies, the surface of the dark brown or brown, thin and rough outer skin, there are obvious elevated wrinkles, weight, hard texture, uneven cross-section, granular or powdery, the outer layer of light brown, the inner layer of all the white, a few there are for the light brown, and can be seen fissures or brown loose roots and white fluffy pieces embedded in the middle. The counterfeit Poria is generally made of flour or lime powder added to Poria powder to fake. Careful observation, the visible surface color is slightly uneven, because it contains starch, occasionally see moldy spots, smell the gas slightly, the entrance taste slightly sweet, no sticky teeth. Poria is mixed in the market, no professional knowledge of Chinese medicine is difficult to identify, it is recommended to buy Poria need to formal Chinese medicine hospitals to buy.