I don't know Ina, but even it the water is high in minerals like magnesium, calcium and iron, it still doesn't contain any vitamins like vitamin C (ascorbic acid), vitamin D3, B vitamins, etc. So in the least, I think you'd still need to take a vitamin supplement, unless you eat such a nutritional diet that you get all of the necessary vitamins from your foods. I know I don't, always take a multi vitamin/mineral, plus some added supplements.