Okay, thank you very much Andy and Canadian Family.
Also found this while researching. Which type of magnesium is best?
Osteoporosis
Magnesium is involved in bone formation and influences the activities of osteoblasts and osteoclasts [48]. Magnesium also affects the concentrations of both parathyroid hormone and the active form of vitamin D, which are major regulators of bone homeostasis. Several population-based studies have found positive associations between magnesium intake and bone mineral density in both men and women [49]. Other research has found that women with osteoporosis have lower serum magnesium levels than women with osteopenia and those who do not have osteoporosis or osteopenia [50]. These and other findings indicate that magnesium deficiency might be a risk factor for osteoporosis [48].
Although limited in number, studies suggest that increasing magnesium intakes from food or supplements might increase bone mineral density in postmenopausal and elderly women [1]. For example, one short-term study found that 290 mg/day elemental magnesium (as magnesium citrate) for 30 days in 20 postmenopausal women with osteoporosis suppressed bone turnover compared with placebo, suggesting that bone loss decreased [51].
Diets that provide recommended levels of magnesium enhance bone health, but further research is needed to elucidate the role of magnesium in the prevention and management of osteoporosis.
Andy, do you have something on bone health for thals that i could print to show the consultant. The consultant doesn't seem to think that supplementation of vit d, magnesium, calcium and zinc is important, that these should taken mostly by diet.