Can you feel tired and sleepy from a lack of food?

Yes, feeling tired and sleepy from a lack of food is common. This is because food provides the body with energy, which is essential for all bodily functions including physical activity and mental alertness. When a person does not consume enough food, the body does not have enough energy to function properly, which can lead to feelings of fatigue and sleepiness. This can also be accompanied by other symptoms such as lightheadedness, headaches, and irritability. In severe cases, malnutrition from lack of food can even lead to death.