There are actually many health issues that can be caused by too much of one certain food. For instance, some foods in excess can cause low thyroid, achy joints, acne or even insomnia. Others can cause adrenal fatigue, headaches and higher levels of stress. The best way to prevent health issues that can be caused by too much of one food is to simply eat different meals. It’s fine to have the same breakfast a few time a week, or even every other day, but don’t have it day in and day out for months on end. Nightshade veggies like potatoes, tomatoes, eggplant and peppers have been linked to arthritis in excess, while legumes and beans have been linked to decreased mineral absorption in excess. Some foods like spinach, kale, soy and broccoli have been linked to low thyroid in excess, and too much Vitamin A from foods like carrots, sweet potatoes and squash can cause your skin to turn orange. While this isn’t a health issue, it can be annoying, nonetheless. Avoid all these issues by simply switching up your foods. I think you’ll find it’s quite simple and very easy to do once you get the hang of it!