Sodium nitrite: mainly used in cured meat food, mainly as a preservative, color and eliminate the role of Clostridium botulinum. In meat products, its maximum dosage is 0.15 grams per kilogram, in sausage is allowed to add 0.03 grams.

For example, in the process of food processing (such as buns, doughnuts), in order to make fermentation, save processing time, illegal addition of alum-containing bulking agent, or even excessive addition of use. Since alum contains aluminum ions, the addition and use of alum in the process of food processing may lead to the production of food products with aluminum content seriously exceeding the standard. Excessive intake of aluminum ions will affect the body's absorption of iron, calcium and other components, leading to osteoporosis, anemia, and even affect the development of nerve cells resulting in lower IQ in children, the elderly for a long time, but also easy to lead to accelerate the brain dementia.

So, any additives overdose, overdose are life-threatening.

So, any additive overdose, overdose is life-threatening.