why peppers are hot?

I was wondering why chili peppers are hot. Do you wonder too? Well, I found the answer to this. The new research study shows that it has something to do with insects and microbes. Some peppers grow that heat to fight a seed-eating fungus. These fungi eat down the seeds. The scientists noticed that plants in areas with more of the seed-destroying fungus produced more capsaicin—it is a substance that gives the peppers their heat. That is very interesting! Actually, chili peppers are good. It boosts our immune system!