I like Mercola but he likes to sell things and spam my inbox.
My theory is his patients that experienced hair-loss had other problems causing this and he doesn't reveal all the health/lifestyle variables about these patients. All we can do is take his word for it. Otherwise, if he's correct, why don't we see this in the majority of distilled water consumers??
What did our ancestors drink? Well, who are our ancestors? You have to establish that first. There are many races of humans, and how far back in time are you willing to go?
Which "healthy society" study are you referring to drinks hard water? Thanks.