Yes, you can certainly feel that way from a sensitivity. Aged foods remind me of sulfate and avocado can cross react with latex .. just some thoughts to ask your doctor about maybe.
Hello~Usually the fatigue comes from a type of allergy or sensitivity to the offending food. Most red meats have chemicals in them, you could be having a reaction to them. Try to avoid foods that make you tired, then when you start feeling better add them back one by one, see which ones cause the most fatigue.