Okay, in my "EXPERT" opinion. Yes, you can drink RO
water. I'm in the Navy. We spend 2/3 of our life on the ocean. We have 2 RO
's onboard. They each make about 12,000 gallons of "drinking" water per day. The only thing we add is bromine to kill bacteria. With a crew of 340 people, nobody has gotten sick and/or died from the water. (we have a few DDG's in San Diego and they haven't reported any issues either) The DI
water is where the danger comes in. It removes ALL impurities from the water. We use that stuff to wash down gas turbine engines and cooling water for equipment because there is nothing in the water to allow corrosion. DI
water will make you sick in large or regular quantities. Simply because there aren't any minerals your body needs. Remember, even the ocean has trace elements in the water. Just as lakes, streams, or a well which is where you get your drinking water from.