Originally Posted by ReefmanV
Please be careful using only RO water for consumption. Even when adding just grains the water will be missing many minerals. The problem comes on e it's consumed the body always is trying to keep a boa lance of different levels. In this case these minerals can be pulled out of our bones. One batch probably not an issue, but years of drinking fluid devoid of these important minerals can cause many health issues. There are many article lee online that speak to this, I am a nurse by trade, but don't take my word for it, please do some additional research before you start off into a life time of brewing this way.
Wow, what a bunch of silly nonsense. If the only thing you consumed in your diet was RO water you might have some health issues, but the ion/mineral rich diet we all have prevents the "stripping" of nutrients from our tissues. It all mixes together in the gut Jim!