1, overnight ginkgo congee can not eat. Overnight ginkgo congee nutrients are reduced, and may also increase the nitrite content, which is harmful to the human body.

2, silver ear porridge is rich in nutritional value, contains collagen, dietary fiber, vitamin A, vitamin B and pectin and other nutrients, moderate consumption of fresh silver ear porridge has antioxidant, promote calcium absorption, enhance the role of the body's immunity, can provide energy for the body's metabolism. Long-term reasonable consumption of ginkgo gruel, can play a gas and blood, clear and moist stomach, nourishing Yin and lungs and so on.

3, silver ear porridge overnight nutritional value will be relatively low, and in the bacterial decomposition, produce nitrite. When the human body intake contains nitrite porridge, nitrite will destroy hemoglobin through the blood, so that the blood oxidation of hemoglobin into methemoglobin, so that the loss of the ability to carry oxygen, affecting the body's hematopoietic function, may be anemic symptoms, is not conducive to good health. Therefore, it is not recommended to drink overnight silver ear porridge.