Cayenne

Cayenne is widely used as a popular spice, but cayenne peppers also are dried and powdered or tinctured for medicinal purposes.
Cayenne stimulates digestion and muscle movement in the intestines, which helps restore deficient digestive secretions and aids absorption of food nutrients. (Stomach acid tends to decline with age, and some cases of poor digestion are related to a lack of this acid.)
Cayenne also stimulates circulation and blood flow to the peripheral areas of the body. Because it stimulates digestion and circulation, cayenne is often added to a wide variety of herbal remedies; it improves the absorption and circulation of the other herbs throughout the body.
Cayenne warms the body and stimulates the release of mucus from the respiratory passages. Anyone who has eaten cayenne knows that hot peppers can clear the sinuses and cause sweating.
Cayenne actually can raise the body temperature a bit, as it stimulates circulation and blood flow to the skin. An herb such as cayenne or ginger that promotes fever and sweating is considered to have a diaphoretic (sweat-inducing) action. This action can help reduce fevers and relieve such the congestion of colds and sinusitis.
Cayenne is a popular home treatment for mild high blood pressure and high blood cholesterol levels. Cayenne preparations prevent platelets from clumping together and accumulating in the blood, allowing the blood to flow more easily. Since cayenne is thought to help improve circulation, it's often used by those who have cold hands and feet.
Cayenne peppers are used topically as a pain-relieving muscle rub and joint liniment. The source of the heat is capsaicin, the fiery phenolic resin found in most hot peppers. Capsaicin causes nerve endings to release a chemical known as substance P. Substance P transmits pain signals from the body back to the brain.
When capsaicin causes substance P to flood out of the cells, you experience a sensation of warmth or even extreme heat. When the nerve endings have lost all of their substance P, no pain signals can be transmitted to the brain until the nerve endings accumulate more substance P. For this reason, topical cayenne pepper products are popular for the treatment of arthritis, bursitis, and for temporary relief of pain from psoriasis, herpes zoster, and neuralgia (nerve pain). These cayenne preparations are most appropriate for long-standing chronic conditions, not acute inflammations.
Cayenne often is found in diet and weight-loss formulas. Cayenne may support your diet and exercise efforts. Because cayenne aids in digestion and absorption of nutrients, it can reduce excess appetite that is due to malabsorption, a common condition in overweight people.