Turmeric has been a popular spice for over 2500 years.  It is one of the key ingredients of India's well known curry powder.  In addition to flavoring food, it is also popular, especially in India, as a healing herb.  It is reputed to help keep the arteries clean and reduce cholesterol.  It is also a natural blood thinner.  In India, turmeric mixed with honey or milk is used for wounds, flu, colds, sinus problems, and added to bath water for healthy skin.  A paste of turmeric is applied externally on ulcers, wounds, and inflammations. 
In Ayervedic herbal medicine, it is recommended to treat cancers, diabetes, digestive problems, infections (both external and internal), parasite infections and poor circulation.  It is very good at removing mucus from the throat.  It reduces fevers, urinary problems, and lactation difficulties.  Turmeric, and oils derived from it, are common ingredients in over-the-counter treatments.