The principle of Usana is to keep healthy and make the body resistant to diseases. Can't say it's medicine, it's a false propaganda. It can only be said that it is a nutritional health care product, but the scientific formula at the level of cell nutrition makes it really effective for some diseases. I suggest you read The Truth of Health-Liao Xiaohua, Don't let a voice that you don't understand nutrition hurt you-two books written by Dr. Lei. The real cases in the book illustrate the curative effect of nutrition on health and disease resistance. There is no mention of the brand of nutritional products in the book, but in fact, the authors of both books are senior nutrition consultants of Usana.