When we’re under the weather, it’s easy to notice changes in our bodies—fatigue, aches, perhaps a bit of a fever. But one thing that might surprise you is finding yourself hungrier than usual.
If you’ve ever wondered why your appetite spikes during illness, you’re not alone. Join me to explore the science behind this phenomenon.
1. Immune system energy demands
Your body’s immune system kicks into high gear, working tirelessly to fight off the infection. This process requires energy. This is one reason why you might find yourself reaching for an extra snack or two when you’re feeling unwell.
2. Increased metabolic rate
This means you’re burning more calories even while resting. To compensate for this increased calorie burn, your body may prompt you to eat more, fueling the battle against illness.
3. Inflammation and appetite
Certain illnesses trigger an inflammatory response in the body, releasing cytokines that can affect appetite regulation. These chemicals might alter your hunger signals, making you feel hungrier than usual as your body seeks the nutrients it needs to repair itself.
4. Nutrient replenishment
Illness can deplete your body of essential nutrients, especially if you’ve been dealing with symptoms like vomiting or diarrhea. To replenish these lost nutrients, your body may trigger hunger, encouraging you to eat foods rich in vitamins and minerals that support recovery.
5. Hormonal imbalance
Ghrelin and leptin are two key hormones that regulate hunger and fullness. During sickness, the balance between these hormones can be disrupted. If ghrelin levels rise or your sensitivity to leptin decreases, your hunger levels can increase, leading you to eat more.
…
While it might feel strange to have a bigger appetite when you’re sick, it’s often your body’s way of telling you it needs extra fuel to heal. It’s important to listen to these signals and nourish your body with wholesome, nutritious foods.