Too much of a good thing? Foods that can be toxic if you eat them in excess

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.

Source: Fix.com Blog