Goji berries put blackened can not be eaten. 1. Chinese wolfberry stored for a long time and the surface blackened can not eat again. After the deterioration of black wolfberry not only lost its medicinal value, but also may produce some toxic substances, after eating may cause food poisoning and so on. 2. After the moldy wolfberry skin will be black, touch with your hands have a sticky feeling, and the surface of the wolfberry those viscous secretion will make them stick together, smell is also a rotten taste. If you observe the above phenomenon, it indicates that the wolfberry has been breeding a large number of bacteria and toxins inside, if the medicine or as an ingredient to eat, there is a great harm to human health. Warm tips: the storage of wolfberry is best placed in a low temperature, light and ventilation of the environment, and to often check, once the wolfberry appears black, to be timely treatment to avoid misuse.