Chillies, also known as peppers, are fruits from the plant species Capsicum. They come in various shapes, sizes, and colors, ranging from green to red, yellow, and even purple. Chillies are known for their spicy flavor, which comes from a compound called capsaicin. This compound can vary in concentration, making some chillies very hot while others are mild. Chillies are widely used in cooking around the world, adding heat and flavor to dishes. They are also rich in vitamins, particularly vitamin C, and have been linked to various health benefits, including improved metabolism and pain relief.