Is it true that being underweight can make your body better able to fight off diseases?

Being underweight is generally associated with a compromised immune system rather than enhanced capabilities to fight off diseases. A body that is underweight often indicates insufficient nutrient intake, leading to deficiencies in essential vitamins and minerals that are critical for maintaining a healthy immune response.

When the body lacks adequate nutrition, it cannot produce enough immune cells and antibodies needed to combat infections effectively. Conversely, a healthy weight typically supports robust immune function as it ensures the body has the necessary resources to defend against pathogens.

While individual experiences can vary, the overarching conclusion is that being underweight does not confer any advantage in disease resistance. In fact, it tends to have the opposite effect, making individuals more susceptible to illnesses.