> Distilled water is fine. The idea that distilled water is harmful probably derives from the fact that in areas where the water has a high mineral content, people have been healthier on average than in areas with naturally “soft” water, but that involves several factors, especially the fact that hard water doesn’t dissolve as much lead from the plumbing (such as soldered connections of copper pipes), and also that agricultural products in those areas are likely to have a higher trace mineral content. Generally, water is softer in areas with higher rainfall, and that means that people in those regions are more likely to have less sunlight, and a [[vitamin D]] deficiency affects mineral metabolism. In general, it’s best to drink water only when you’re thirsty.