Turmeric has been used in Asia for thousands of years and is a major part of Siddha medicine. India is the largest producer of turmeric. When not used fresh, the rhizomes are boiled for about 30–45 minutes then dried in hot ovens, after which they are ground into a deep-orange-yellow powder. Turmeric powder is mostly used in savory dishes & traditional medicines. It is used for medical treatment like it is used for headaches, bronchitis, colds, lung infections, fibromyalgia, leprosy, fever, menstrual problems, and cancer. Other uses include depression, Alzheimer's disease, water retention, worms, and kidney problems.