Care to explain why this would give someone kidney stones? I've been on a variation of the 5-2 diet (eat 5 days a week, fast 2 days a week) for about 7 years. I

Care to explain why this would give someone kidney stones? I've been on a variation of the 5-2 diet (eat 5 days a week, fast 2 days a week) for about 7 years. I've had kidney stones once in my life but it was years before I ever tried fasting/keto/5-2.