Eating a large meal while extremely tired is likely to do what?

• A. It can make you more tired
• B. It wakes you up
• C. It has no effect
• D. It causes immediate sleepiness

Answer: (A)

When you eat a large meal, your body shifts energy toward digestion. More blood goes to the digestive tract and your metabolism works harder to break down and absorb nutrients. That can leave less blood flow and energy for the brain, which often makes you feel tired. If the meal is rich in carbohydrates, insulin rises and can alter the balance of amino acids reaching the brain, boosting sleep-promoting chemicals like serotonin and melatonin. Since you’re already extremely tired, this effect is amplified, making you feel even more sleepy after the meal. It’s not about waking you up; the typical outcome is increased tiredness, not no effect or immediate sleepiness.