: Dr. Arnold Ereth's book is still very relevant today.......... It gives a number of simple, but at the same time very necessary tips for the improvement of the human body..... [ Author's "theory of mucus" found support in modern medicine The author is a supporter of the transition of man to fruit, t. e. "unslip", a diet that is effective in the treatment of not only obesity, but also chronic kidney disease, gastrointestinal tract, lungs, skin. The book is intended for a wide range of readers who are interested in maintaining their health and longevity. 85