![39ec2cfd-Perfect baby spinach greens](https://a57.foxnews.com/static.foxnews.com/foxnews.com/content/uploads/2018/09/1200/675/trtert3463636.jpg?ve=1&tl=1)
Looking to clean up your diet? Dark, leafy greens including spinach and Swiss chard, fiber-rich kidney beans and brown rice, heart-healthy nuts, lean proteins such as tuna, and plenty of water all make up a healthy diet. But believe it or not, it is possible to have too much of a good thing when it comes to some healthy staples. While overdoing it on most of the nine foods below is rare - most require a person to eat or drink a lot of servings in one sitting - others can cause issues when consumed regularly over time.