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.
Hyperglycemia. For many people with diabetes, eating too much, and especially eating too much carbohydrates and sugar, makes them feel very tired after the meal. Feeling tired and lack of energy are common symptoms of hyperglycemia, or high-blood sugar levels.owever, if you feel sleepy after a meal or find yourself taking a nap on the couch after eating, it may be because of your diabetes. You will need to do a bit of experimentation to find out the cause of your sleepiness, but it is possible to correct this simple problem.