It happened to us all that after lunch we were asleep. The almost irresistible desire to snore doesn't happen immediately after you eat lunch, but it happens. 45-60 minutes after this meal we'd give everything not to be in the office, but where does this need for sleep come from at that hour?
From the volume of food we ate at lunch and from the presence (or not) of alcohol. In some cultures, lunch is the main meal and people after this meal close shops around 1–4, employees or children go home to eat and rest until the afternoon.
The generally known reason for this reduction in energy is the increase in blood circulation in the gastrointestinal tract away from the brain, but it is still not entirely clear why sleep comes as a result.
Abundant and larger meal times compared to others are also one reason why the need for sleep after lunch arises.
Fat-rich foods are linked to increased desire to sit during the day and lack of desire to deal with other activities.
Egg-rich breakfasts, omelettes, cheeses, chips, butter cookies, etc., etc. should not be consumed before an important exam or presentation, i.e. in a nutshell if the day and afternoon require your maximum energy and attention.
Instead, you can consume a toast with avocado, a healthy salad, or chicken fileto. Studies have shown that it is such foods that help people perform better during a presentation or duty.
Other foods, consume them if you have no plan and can sleep without leaving any obligation for later.
Burimi: Psychology Today