Whereas a healthy ratio should be 1 to 1, the average civilized diet contains 2 to 4 times as much phosphorus as calcium. Excess phosphorus stimulates the parathyroid gland to extract calcium from the bones. It also inhibits magnesium absorption. Meat, processed foods and carbonated beverages often contain high levels of phosphorus. While fluoride provides strength, durability and resistance to demineralization of teeth and bones, there is considerable controversy regarding the sources of fluoride and its maximum safe dosage.
Some clinicians feel that fluoride supplementation in any form is unwarranted.
Synthetic sodium fluoride may actually increase fracture rates, while fluoride from natural sources found in food are beneficial. The RDA is 1.5-4 mg . The optimal level is unknown. This critical vitamin plays a vital role in bone metabolism, promoting the absorption of calcium and phosphorus and helping to regulate their transport into and out of bone. While the adult RDA for vitamin D is 200 i.u.