Add to that the high oxalate content in dark chocolate. https://www.sciencedirect.com/science/article/abs/pii/S0889157511000822 https://www.sciencedirect.com/s

Add to that the high oxalate content in dark chocolate. https://www.sciencedirect.com/science/article/abs/pii/S0889157511000822 https://www.sciencedirect.com/science/article/abs/pii/S08891...