Good source of calcium. High mineral content. Contrexeville, France since 1861. The French woman's secret. We'll let you in on a little secret. Deep in the Vosges Region of France, in the town of Contrexeville, lies a secret that French women have been enjoying as a part of their healthy lifestyle for over 50 years. Experience the natural benefits and taste of Contrex Mineral Water, a good source of calcium for your daily life. Mineral content (mg per liter). Calcium: 468. Magnesium: 74. Exposure to extreme cold may cause the minerals In Contrex to crystallize - this poses no health risk.