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We have known for a long time that phosphate stone formers are mainly women. We also have long known that phosphate stones form when urine is more alkaline, and that women produce a more alkaline urine than men. So the fact of phosphate stones being more in women seemed a consequence of their physiology. But why? Why do women have this physiology, this alkaline urine? Have it so consistently they form calcium phosphate stones as geological relics? If asked, most would say women do this because of how they eat. Compared to men women eat more veggies, a source of alkali, and less meats – a source of acid. More alkali in their diets, a more alkaline urine, phosphate stones, … Continued