Green chillies or Green Peppers contain zero calories. It’s a well known fact, that they speed up one’s metabolism by almost 50% for up to three hours post consumption. Loaded with Vitamin C and beta-carotene, green chillies are considered healthy for our eyes, skin and the immune system. Green chillies are a natural source of iron, and a rich source for iron deficient people. Protection against cancer: Green chillies are loaded with antioxidants and protect the body against free radicals by acting as natural scavengers. Green chillies can also keep prostate problems at bay.