In the early 1980s, the beverage industry introduced a new sweetener-aspartame, which is usually called "Abbas sweet". Abbas is 180 times sweeter than sucrose, but it can't provide any heat. Because the US Food and Drug Administration considers it a safe substitute for sucrose, this substance is widely used in food production. In the intestine, a decomposition process of Abbas sweet will produce two amino acids-aspartic acid and phenylalanine, both of which are neurotransmitters. Another decomposition process produces methanol and formaldehyde. About 10% of the aspartame obtained from food will be converted into methanol and formaldehyde. Some people claim that methanol can be absorbed and decomposed by the liver, but as we all know, methanol is actually a toxic substance. Methanol and formaldehyde can damage the optic nerve and even lead to blindness. In recent years, the incidence of optic nerve spot and retinal neurosis in the United States has increased seriously, especially among teenagers, which is inseparable from the widespread use of Abbas sweet. Another side effect of Abbas sweet is that it will promote the formation of brain tumors and cause secondary nervous system disorders. There is no doubt that the food and drug administration's permission to use aspartame has caused many health problems. Some people drink several cups of diet drinks every day, so their bodies are seriously damaged by methanol and formaldehyde. Unfortunately, the damage of methanol and formaldehyde to human nervous system is cumulative. After "Abbas sweet" and caffeine enter the human body, it will stimulate the cellular physiological processes in the brain, liver, kidney, spleen and endocrine system. Most aspartame will be converted into aspartic acid and phenylalanine, both of which directly stimulate the brain. Under the joint action of aspartame and caffeine, the brain will soon lose its original metabolic balance, because the acquisition of aspartic acid and phenylalanine becomes much easier than other amino acids. Most amino acids need to undergo some biochemical reactions to produce corresponding neurotransmitters. But aspartic acid (and glutamic acid) is an exception, which can directly act on the brain itself. Studies have shown that the nervous system with more aspartic acid receptors is the activation system of reproductive system and mammary gland. Long-term nerve stimulation of the breast, but no other neural signals related to pregnancy, may lead to breast cancer. Personally, I believe that the long-term intake of "Abbas Sweet" leads to a large secretion of lactating estrogen, which is the source of the sharp increase in the incidence of female breast cancer this year. Another bad result of taking "Abbas Sweet" is that it may be one of the inducing factors of brain tumor formation, and this correlation has been verified in animal experiments with white mice. Reducing the use of artificial sweeteners, drinking less sweet drinks and eating more natural foods are the best ways to reduce brain tumors, breast cancer, vision problems and other diseases, and are important concepts of health and longevity.