If distilled water caused hair loss, there would be an alarming rate of hair loss since the US navy uses only distilled water when they are months at sea.
If distilled water caused ill health, the hundreds of thousands of students from Bragg, Shelton, Christopher, and Ehret (+ hundreds of other fasters) would not have their diseases reversed, the aging process pushed back, and they would not enjoy the health and longevity they do.