A less common and less suspected cause of disease is the deficiency (and sometimes excess) of minerals (trace elements) in food. Essential minerals are needed by the body to make enzymes, hormones, bone tissue, etc. Deficiencies usually occur because one or more trace minerals may be lacking in the soil in which the food plant was grown. Crops which are grown in deficient soil display poor condition and are susceptible to disease and attacks by pests.

Animals are more prone to display signs of mineral deficiencies than humans because humans consume food usually imported from all over the place whereas animals graze in the same areas all the time. There are some more or less isolated areas where people are dependent on crops grown in deficient soil such as in certain areas of Europe where iodine is lacking, the sign of which is the proneness of people to goitre. However, the subtleness of biochemistry is demonstrated by the fact that in Tasmania in 1949 it was noted that in some districts where iodine was plentiful in the soil there was, notwithstanding, a very high incidence of goitre which when iodine tablets were given only got worse. It turned out that the goitres were caused by an anti-thyroid factor contained in the milk of cows which were fed on marrow stem kale. White clover and cabbage under certain conditions of cultivation also sometimes contain an anti-thyroid factor capable of causing goitre. However, experiments at the Central Veterinary Laboratory in Weybridge, England, showed that marrow stem kale did not always contain the anti-thyroid factor which varied with the soil in which it was grown and the climatic conditions as well.

Thus it can easily be accepted that all other things aside, mineral imbalance alone in an otherwise healthy diet can severely impair the body's homeostasis, leading to symptoms of all kinds or the exacerbation of existing symptoms.

In the book Soil, Grass and Cancer by Andre Voisin (Crosby Lockwood, London, 1959), from which the foregoing information was taken, the author described the functions of the various trace minerals in normal metabolism and the operation of the immune system, in particular the role of magnesium, copper and zinc in the functioning of the immune system.

Voisin emphasised that administering mineral salts to experimental animals led to wrong conclusions being formed because the only way the body can property assimilate minerals is in organic form, having been first taken up from the soil and changed to a colloid form by the plant used as food.

That the content of various minerals in a plant can vary enormously depending on the soil, the water content of the soil, the weather and so on means that the best way to obtain your minerals is from a variety of fresh, raw fruits and vegetables. Apart from vitamins and other nutrients in raw fruit and vegetables--preferably organically grown--the abundance of organic minerals they contain explains why patients with cancer respond so well when restricted to these foods.

That the mineral content of seawater is practically the same as blood is significant, and it is a fact, according to Dr Maynard Murray, that seawater contains all the trace minerals needed by humans. Dr Murray demonstrated forcefully that animals fed on his crops fertilized sparingly with diluted seawater exhibited superior growth and health compared to other animals. This is described in Dr Murray's book Sea Energy Agriculture(see Chapter 8). Said Dr Murray:

"The disease resistance of plants and animals in the sea is remarkably different from disease resistance in land animals and comparisons between animals of the same or similar species are most interesting. For example, fresh-water trout all develop terminal cancer of the liver at the average age of 5-1/2 years; cancer has never been found in sea trout. It is also known that all land animals develop arterio sclerosis, yet sea animals have never been diagnosed as arteriosclerotic. Investigators have also established the startling absence of disease in the sea, citing not only the absence of 'chronic' disease forms, but especially the general vigorous health of sea animals that has apparently lengthened life many times in comparison to similar land species. These longevity differences are especially evident in such sea mammals as whales, seals and porpoises who have identical physiological systems with the majority of land animals important to man. And the major differences between sea and land life appear to be attributable to the superior food chain of the sea!"