• Capsaicin: Chillies have vitamin C and Vitamin A containing beta-carotenoids which are powerful antioxidants.  These antioxidants destroy free radicals.  Usually, these free radicals may travel in the body and cause huge amounts of damage to cells.  These free radicals could damage nerve endings and blood vessels in diabetics.
  Chillies have antioxidants that can destroy cholesterol which could cause several major diseases like atheroscleros,  cataracts and arthritis , osteoarthritis and rheumatoid arthritis.  It also dilates airways of the lungs which reduces asthma and wheezing.
• Detoxifies:  Chillies acts as detoxifiers, as they removes waste products from our body and increase  the supply of nutrients to the tissues.  It also acts as a  gastrointestinal detoxifier,  helping in the digestion of food.
• Pain killer:  Chillies stimulates the release of endorphins that are natural pain killers. It relieves pain caused due to shingles (Herpes Zoster),  bursitis,  diabetic neuropathy and muscle spasms in shoulders and extremities.  It also helps in relieving arthritic pain in the extremities.
• Antibiotic:  Chillies brings fresh blood to the site of the infection.  The fresh blood fights infection.  The white blood cells and leukocytes present in the fresh blood fights viruses.
• Brain :  Capsaicin stimulates brain to excrete endorphins and gives a sense of pleasure when ingested.  This is the reason people get addicted to chillies.
• Cancer:  It has been noted that vitamin C,  beta-carotene and folic acid found in chilli reduces the risk of colon cancer.  Chillies such as red pepper have cartonoid lycopene, which prevents cancer.
• Heart Attack:  Chillies have vitamin B6 and folic acid.  The vitamin B reduces high homocysteine level. High homocysteine levels have been shown to cause damage to blood vessels and are associated with a greatly increased risk of heart attack and stroke.  It also converts homocysteine into other molecules which is beneficial to lower cholesterol level.
• Lung disease:  Chillies gives relief from nasal congestion by increasing the metabolism.  It also dilates  the airways of  the lungs which reduces asthma and wheezing.  It relieves chronic congestion in people who are heavy drinkers.

Cigarette smoke contains benzopyrene which destroys the vitamin A in the body.  The vitamin A present in chilli reduces inflammation of lungs and emphysema caused due to cigarette smoking.