Alkaline Diet

The Alkaline Diet's core claim—that acidic foods cause disease—is physiologically incorrect, because the body maintains blood pH within a tight 7.35–7.45 range regardless of diet. While it encourages healthy produce consumption, it is less grounded in science than #6 Paleo Diet, which at least cites ancestral eating patterns. A 2018 review in the Journal of Human Nutrition found no evidence that alkaline water improves bone health, debunking a key marketing point.