 Yes, that's a great question. So, Kevin, kidney stones are really interesting. Some people tend to get them and some people don't. But if you do tend to get them, it's calcium oxalate or what these stones are made out of. So your body's not handling calcium and your body's not handling what's called oxalic acid. So as good as green leafy vegetables are for you, you probably want to stay off the spinach and the kale. On your salads, when you eat greens, do more of like the spring mix and the romaine lettuce, okay?