Chili pepper

Chili peppers are the shiny, brightly colored fruits of plants in the genus *Capsicum*, which belongs to the nightshade family, Solanaceae. Botanically, these fruits are berries, and they are cultivated primarily for the pungent, spicy heat they provide as a seasoning in cuisines worldwide. This pungency comes from capsaicin and related capsaicinoids, chemical compounds that create a burning sensation when ingested or applied to the skin. The plants themselves are small, ranging in size depending on the variety, and are perennial if protected from cold temperatures. Their fruits display a wide range of colors—including green, orange, red, and purple—and shapes, from round and knobbly to smooth and elongated. The heat and flavor profiles of different chili peppers vary considerably, which is why numerous types of chili powder exist, each offering distinct taste and spiciness.

The origins of chili peppers trace back to Central or South America, with the plants first domesticated in Mexico. Archaeological evidence shows that *Capsicum* plants originated in what is now Peru and Bolivia, and they have been part of human diets since around 7,500 BC, making them one of the oldest cultivated crops in the Americas. They were independently cultivated in different regions, including east-central Mexico, highland Peru and Bolivia, and the Amazon. Peru is noted for having the highest diversity of cultivated *Capsicum* species, while Bolivia holds the greatest diversity of wild chili peppers. European explorers introduced chili peppers to the Old World in the late 15th century as part of the Columbian exchange. Unlike black pepper (*Piper nigrum*), which only grows in the tropics, chilies could be grown in temperate climates, leading to their rapid spread across Europe, Africa, and Asia through Portuguese and Spanish trade routes. Five species of *Capsicum* have been widely cultivated: *annuum*, *baccatum*, *chinense*, *frutescens*, and *pubescens*.