Here’s the nutritional breakdown for one 45-gram hot red chili pepper (4Trusted Source):
Calories: 18
Protein: 0.8 grams
Fat: 0.2 grams
Carbs: 3.9 grams
Fiber: 0.7 grams
Vitamin C: 72% of the DV
Provitamin A: 48% of the Daily Value (DV)
Vitamin B6: 13% of the DV
Vitamin K: 5% of the DV
 
Chili peppers like cayenne peppers are especially rich in provitamin A carotenoids and vitamin C.
Vitamin A exists in two forms: provitamin A and preformed vitamin A. Provitamin A carotenoids are found in plant foods, while preformed vitamin A is concentrated in animal foods (5Trusted Source).
Provitamin A carotenoids found in cayenne include alpha carotene and beta carotene, which the body can convert into the active form of vitamin A (6Trusted Source, 7Trusted Source).
Vitamin A is an essential nutrient that’s involved in many aspects of health. For example, it’s necessary for (7Trusted Source, 8Trusted Source):
the functioning of the immune system
vision
reproduction
growth and development
bone health
Plus, hot peppers like cayenne peppers are packed with vitamin C.
 
A source of capsaicin  pain relief, improved athletic performance, and lowered blood sugar levels.
 
Well-known plant compound found in cayenne peppers, they contain many more protective plant compounds that may have antioxidant and anti-inflammatory effects in the body. Flavonoids, vitamin C, and carotenoids.
 
Relieves Nerve and Joint Pain
 
Heals Psoriasis, Powerful Antioxidant, Allergy Prevention, Detoxification Support, Fights Cancer, Anti-Fungal Properties, Reduces High Blood Pressure, Prevents Food Contamination,
 
Increases Theophylline: Theophylline is a bronchodilator that treats asthma and other lung conditions, and the capsicum annum found in cayenne pepper can increase the amount of theophylline the body can absorb.
 
Prevents strokes by opening up arteries and blood vessels.
 
Prevent heart attacks.
 
https://community.bulksupplements.com/cayenne-pepper/
 
https://www.healthline.com/nutrition/8-benefits-of-cayenne-pepper#The-bottom-line