Eating healthy is eating variety. Eating the same breakfast, lunch and dinner every day is not just only boring, it is also nutritionally limiting and shortsighted. The variety in food ensures a proper taste and getting all the nutrients your body needs.
You always miss one or other type of nutrition like antioxidants, calcium, folic acid etc depending upon your food, when you consistently stick to a monotonous and boring food plan. The worse is potential overloading on some harmful substances, like preservatives or environmental pollutants such as mercury.
To find out if you need more variety in your healthy food plan, you need to count how many different foods you eat in a three day period. According to USDA, 16 or higher means you have got good variety in your food.
A score of 6 or less gives enough reason to change your diet immediately. You are definitely missing out on many nutrients. Surely there are not miracle foods which contain all the nutrition our body requires.
No wonder it was found in a study examining the diet of nearly 10000 men and women that consuming increased dietary variety within each food group can boost nutrient adequacy by up to 73 percent.