Expert consensus -- Overview of global dietary calcium and magnesium intakes and allowances / S.A. Atkinson, R Costello and J.M. Donohue -- The mineral composition of water and its contribution to calcium and magnesium intake / C.N. Ong, A.C. Grandjean and R.P. Heaney -- Identifying magnesium deficiency : a diagnostic dilemma / R.J. Elin -- Magnesium deficiency : clinical and experimental aspects / W.B. Weglicki -- Magnesium and hypertension / R.M. Touyz and B. Sontia -- Atherosclerosis and magnesium / B.M. Altura and B.T. Altura -- Health significance of calcium and magnesium : examples from human studies / G.F. Combs, Jr and F.H. Nielson -- Calcium and magnesium : role of drinking-water in relation to bone metabolism / C.M. Weaver and J.W. Nieves -- Epidemiological studies and the association of cardiovascular disease risks with water hardness / R. Calderon and P. Hunter -- Alternative hypotheses and knowledge gaps / J.K. Fawell -- Water production, technical issues and economics / P. Regunathan.