I eat exactly the same foods/drink every day. I have a metabolic disorder and many foods cause me severe adverse effects. It's different than an allergy. I eat only a mixture of no sugar/low sugar cereal with a banana in the morning, a late lunch of a salad with Romaine lettuce, celery, green peppers, carrots, chick peas, tomatoes, a small amount of croutons, topped with sunflower oil and red wine vinegar dressing. For supper I eat a boiled potato, boiled carrots, boiled green beans, and some type of chicken, either grilled, air fried, or oven roasted. Rarely, I will eat some fish, but not fried. No fried anything. No bread. No salt on anything. Lots of pepper, though. I cook everyday. I only drink water and the fat free milk I have with my cereal in the morning. I allow myself one granola bar per day. No other sweets, though. I do this to manage how I feel through diet and to maintain decent functioning of myself. And, yes, it IS tiring.