I have an RO system for drinking water. I fill the pitcher with RO water, and that is all I have been drinking the last five days. All I can say is that my energy level has increased tremendously. I am 71 and am remodeling our house and usually gas out after 2-3 hours and then have diminished energy the rest of the day and fall asleep watching TV. The past two days I have put in 10 and 12 hours with taking 10-minute breaks when needed. I have been drinking about 6 quarts a day...I sweat a lot when working. The difference is remarkable with sustained energy throughout. I now think I can finish the work this year if this energy level is sustained. All I can say is that it works for me.
Bottom Line: Yes, I would recommend this to a friend
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