Reverse osmosis effectively strips water of almost all of its minerals, including those that our bodies need. There are no recent studies into whether or not this could be harmful to our health, although the current recommendation from the World Health Organization is that we shouldn’t rely on demineralized water as a long-term source of drinking water. However, many reverse osmosis systems designed for home use come with a remineralization filter built-in, which will restore the minerals useful to our health. And there are other ways you can add back "good" minerals to reverse osmosis water! These include: Adding mineral or electrolyte drops Using a PH-balancing filter  Using an alkaline pitcher to adjust the PH level and remineralize the water Adding a mineral-rich salt to your foods