Walford's principles of extending life are very simple. All you have to do is restrict your caloric intake to about 1,500 per day, and water fast two days a week. Or alternatively, reduce your caloric intake to 1,200 per day and fast only one day a week on water. And make sure that every single bit of food you do eat is packed with nutrition, every single calorie, without exception. You continue this program for the rest of your life along with moderate daily exercise and high but reasonable dosages of vitamins, minerals, and also take a few exotic food supplements. The supplement program is not particularly expensive nor extreme, Walford's supplement program is more moderate than the life extension program I recommend for all middle-aged and older people. The best foods for this type of program is a largely raw food diet (80%) with a predominance of sprouts and baby greens, some cooked vegetables, and raw nuts and seeds. And make sure you get 30 minutes of cardiovascular exercise every other day. While Dr. Walford's focus is on caloric reduction while maintaining sufficient nutrition, most other life extensionists focus on increasing the nutrition side of the equation for health without bothering to reduce caloric intake. This approach is much easier because essentially, it involves gobbling nutritional supplements by the handfuls without requiring self-discipline, though it can get quite expensive. I'll have more to say about this approach in the next chapter, which is about vitamins. In this book I can't explain all the aspects of prolongation of life through conscious life-style choice. Those who are interested are referred to the Bibliography. Chapter Six Vitamins and Other Food Supplements From The Hygienic Dictionary Vitamins. [1] The staple foods may not contain the same nutritive substances as in former times. . . . Chemical fertilizers, by increasing the abundance of the crops without replacing all the exhausted elements of the soil, may have indirectly contributed to change the nutritive value of cereal grains and of vegetables. . . . Hygienists have not paid sufficient attention to the genesis of diseases. Their studies of conditions of life and diet, and of their effects on the physiological and mental state of modern man are superficial, incomplete, and of too short duration. They have, thus, contributed to the weakening of our body and our soul. _Alexis Carrel, Man the Unknown._ I have already explained the hygienist's view of why people get sick. The sequence of causation goes: enervation, toxemia, alternative elimination, disease. However, there is one more link in this chain, a precursor to enervation that, for good and understandable reasons, seemed unknown to the earlier hygienists. That precursor is long term sub-clinical malnutrition. Lack of nutrition effects virtually everybody today. Almost all of us are overfed but undernourished.