India, April 8 -- Hunger can be both mental and physical. Sometimes you are hungry because your stomach is actually growling, and other times, you're just hungry and need to snack out of boredom.

It turns out hunger affects the immune system, even the mental kind, when you're not really hungry. A study published in Science Immunology unveiled this connection, showing how closely thoughts and perceptions are tied to physical health.

It's already well known how immune system is connected to dietary habits through theories like gut-immune axis. Any change in diet affects the immune system. However, this groundbreaking study shows the power of perception over biology; by merely thinking of something can affect the immune system.

The resear...