This section is from the book "The Hygienic System: Orthotrophy", by Herbert M. Shelton. Also available from Amazon: Orthotrophy.
Eating a diet of fresh fruits and of fresh vegetables, particularly uncooked vegetables, will not only guarantee an abundance of iron and calcium, but will, at the same time, guarantee an abundance of the other needed minerals and of all the vitamins required. Taking sodium or phosphorus tablets, vitamin pills, etc., will be of no avail. Stick to nature's products for best results.
Professor Sherman of Columbia University, in his Chemistry of Food and Nutrition states: "The necessity of a generous supply of vegetables and fruits must be particularly emphasized. They are of the greatest importance for the development of the body and its functions. As far as children are concerned we believe that we could do better by following the dietary of the most rigid vegetarians than by feeding them as though they were carnivora. If we limit the most important sources of iron--vegetables and fruits--we cause a certain sluggishness of blood formation and an entire lack of reserve iron, such as is normally found in the liver, spleen and bone marrow of healthy, well-nourished individuals."
 
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