Spinach

It has been always known that this particular green and leafy vegetable is very important for the health and has to be an important part of the diet. It contains some of the most nutritional values such as the high amount of fiber, vitamins and protein that helps in keeping you fit and healthy. Also, it contains lutein that protects you from vision loss at old age. But it also contains oxalate that causes the formation of stones in the kidney. Thus, if you are adding more number of spinach in your diet on a regular basis, have checks whether you are having kidney related issues or not.