A junk-food diet is rich in phosphorus and can produce a relative calcium deficiency and all the problems that this entails. The phosphorus RDA has recently been fixed at 900mg. In 1980, in the USA, it was fixed at a trivial 100mg per day. In the UK, the daily intake is about 1200-2000mg. Good food sources include milk and milk products, nuts and wholegrain cereals, poultry, eggs, fish, meats and legumes.
B vitamins are only effective when combined with phosphate in the body.
It also participates in carbohydrate metabolism. Their research was mainly confined to the type of training being done before the onset of the condition, what surfaces were mostly used, the strength of specific leg muscles and the gait of the foot on landing. Almost as an afterthought, they did a mineral assessment of each athlete. To their astonishment they found that they were all below the average calcium level. Their diet was examined and they were all found to be heavy consumers of cola-based drinks.