A Certain Brand Of Water Has Been Proved To Be Poisonous

In a 2013 study, scientists saw that water is potentially poisonous. In the study they took 4 different kinds of water and gave them to the same person. Each day the person would get a new brand of water and was asked to drink the whole bottle. After testing they found that 1 had contained poison. Scientists are still baffled by this 2013 study.