Researchers in Thailand studied 240 adults with prediabetes (people with high blood sugar, but not yet diabetics) and divided them into two groups. One group was given curcumin supplements six times a day, and the other group was given capsules filled with a placebo.
After nine months, 19 out of the 116-member control group had developed diabetes, but no one in the curcumin-taking group did.
The researchers cautioned that this was a small study, and more research needs to be done. However, turmeric is a popular spice that can easily be added to the diet. Use it in Indian curry, or use small amounts (1/4 to 1/2 teaspoon) to season soups, beans, brown rice, quinoa, or couscous.