The jalapeño chile pepper is arguably the most famous chili pepper in the world! The jalapeño is a medium to large size chile which is prized for its warm, burning sensation when eaten. When ripe, the jalapeño can be 2–3½ inches (5–9 cm) long and is almost always sold while still green. Although small in size, the jalapeno pepper packs a nutritional punch, with notable amounts of two important vitamins. Jalapenos are just one variety of chili pepper, a nightshade vegetable well known for a hot and pungent flavor. These little peppers derive their heat from a natural plant compound called capsaicin, which offers powerful health benefits.
Jalapenos are mostly available green, turning red as they mature. These peppers contain a negligible amount of calories, with only 4 calories in one pepper. They also have less than a gram each of protein and fat and just 0.91 gram of carbohydrates in a serving, making them a good choice for low-carb diets.
Like other peppers, jalapenos are a rich source of vitamin C, with almost 17 milligrams in a small pepper. That is equal to 18 percent of the recommended daily allowance for men and 23 percent for women. Jalapenos also supply a good amount of vitamin A, which supports skin and eye health; one pepper offers 17 percent of the RDA for men and 22 percent for women.