Curcumin, the active ingredient in tumeric, has been the focus of numerous studies at research universities/centers in the States with interesting results. Even the American Cancer Society has a page devoted to tumeric/curcumin.

Here's an excerpt:

Some researchers believe turmeric may prevent and slow the growth of a number of types of cancer, particularly tumors of the esophagus, mouth, intestines, stomach, breast, and skin. One researcher reported that curcumin, the active ingredient in turmeric, inhibited the formation of cancer-causing enzymes in rodents.

Turmeric is promoted mainly as an anti-inflammatory herbal remedy and is said to produce fewer side effects than commonly used pain relievers. Some practitioners prescribe turmeric to relieve inflammation caused by arthritis, muscle sprains, swelling, and pain caused by injuries or surgical incisions. It is also promoted as a treatment for rheumatism and as an antiseptic for cleaning wounds. Some proponents claim turmeric interferes with the actions of some viruses, including hepatitis and HIV.
Supporters also claim that turmeric protects against liver diseases, stimulates the gallbladder and circulatory systems, reduces cholesterol levels, dissolves blood clots, helps stop external and internal bleeding, and relieves painful menstruation and angina, chest pains that often occur with heart disease. It is also used as a remedy for digestive problems such as irritable bowel syndrome, colitis, Crohn's disease, and illnesses caused by toxins from parasites and bacteria.