Can spicy foods kill cancer?
“They found capsaicin, an ingredient of jalapeno peppers, triggers cancer cell death by attacking mitochondria – the cells’ energy-generating boiler rooms.” – BBC
Im not so sure about this, at least the whole spicy food thing since my grandfather and most of my family have died from cancer AND we all absolutely love spicy food 
Maybe they can develop a drug from capsaicin that will help, which would be a blessing! Check out the article.