Duly is defined as at the right time or as expected. An example of duly is a person showing up when they were supposed to arrive. in a due manner; specif., 1  as due; rightfully.  when due; at the right time.
If you eat a high-fat meal, you will feel tired after eating because fat is harder for the body to digest than carbohydrates and protein. When you eat a lot of fat, your digestive system becomes sluggish, and your body sends more blood to your digestive organs so that the job of digesting your food can be done.ood Allergies. A classic symptom of food allergies is feeling tired after eating a food you are allergic too. Common food allergies include gluten (the protein in wheat), dairy products and tree nuts, but sensitivity to any food can cause fatigue.
When to see a doctor. Make an appointment with your doctor if you're feeling fatigued for unexplained reasons. Some anemias, such as iron deficiency anemia or vitamin B-12 deficiency, are common. Fatigue has many causes besides anemia, so don't assume that if you're tired you must be anemic. Some people learn that their hemoglobin is low, which indicates anemia, when they go to donate blood. If you're told that you can't donate blood because of low hemoglobin, make an appointment with your doctor.