High-quality bee pollen must have three conditions: one must be fresh to ensure that the active substance is not lost; the second is to have a safe number of bacteria; the third is not mildew. Pollen is rich in nutrients and is easily affected by moisture, pollution and mildew. Bee pollen must be scientifically sterilized and dried at a low temperature to ensure safe taking. Unsterilized pollen should not be taken at the entrance; undried pollen is prone to mildew and deterioration. In order to be fresh, it must be refrigerated.