The latest research found that a large amount of lecithin in tofu is the raw material for acetylcholine to complete brain information transmission. Acetylcholine deficiency is the inducing factor of brain retardation and Alzheimer's disease. Eat 1~2 meals a week. Especially in winter, there is little activity, waste in the body is easy to accumulate, and brain activity is slower than in summer, which is a good time to eat tofu. Although soybean contains a lot of plant protein, it is not easy to digest and absorb. Only when tofu is made can the absorption rate rise to over 90%.