"But don't forget too that if you really eat four times as much, you will get more oxalic acid, which can lead to problems like gallstones or kidney stones."
「但是不要忘了，你吃了 4 倍菠菜的同時，也吞下了更多的草酸；若和鈣結合而沈澱，就會產生膽結石、腎結石之類的問題。」