Yi Nengjing's book recommended a brand of calcium tablets-Asahi Dear Nature. Asahi Group ranks first in Japan in the field of health care products, and its main products include vitamin B, vitamin C, vitamin E, calcium tablets, folic acid and collagen.

Japan has uniform and strict regulations on the labeling information of health food. In fact, the high illegal cost makes Japanese companies afraid to run a "red light". Relevant departments will conduct regular or irregular spot checks on products. If it is found that health food has no claimed ingredients and efficacy, the enterprise will be severely punished and may even go bankrupt.