Distilled water is not ideal to the human body. First off its acidic and it has no structure. Check out Dr. Emoto work on water structure. He proved scientifically that distilled water is chaotic water, not found in nature compared to spring water. Even rain water has structure.
And also it robs the body of minerals because it has no minerals, and thats why its acidic. If you're drinking distilled water I suggest you at least structure that water. There are numerous ways of doing that but I leave that up to you to ask how or research yourself.