The book by Dr. Arnold Ehret is very relevant today. It gives a number of simple, but at the same time very necessary tips for improving the health of the human body. The author’s “mucus theory” has found support in modern medicine. The author is a supporter of a person’s transition to a fruit, i.e., “mucusless” diet, which is effective in treating not only obesity, but also chronic diseases of the kidneys, gastrointestinal tract, lungs, and skin. The book is intended for a wide range of readers who are interested in issues of maintaining your health and maintaining longevity.