Cayenne
The cayenne family of hot peppers (cayenne, habanero, Scotch bonnet, and bird peppers, to name a few) contains capsicum — a rich source of vitamin C and bioflavonoids, which aid your immune system in fighting colds and flus. It does this by increasing the production of white blood cells, which cleanse your cells and tissues of toxins.
Cayenne pepper is also full of beta carotene and antioxidants that support your immune system and help build healthy mucus membrane tissue that defends against viruses and bacteria. Spicy cayenne peppers raise your body’s temperature to make you sweat, increasing the activity of your immune system.
The fresher the pepper, the more effective it is. However, fresher also means spicier, so choose accordingly.
When you’re sick, add organic cayenne powder to some warm water with lemon juice for an intense immune boost.