Scientists have found three new and relatively rare genetic variants that influence insulin production, offering new clues about the genetic factors behind diabetes.

Diabetes, which affects more than 25 million people in the United States, results from problems with the body’s ability to produce or use insulin. Rather than pinpointing one gene behind the disease, scientists believe there are a whole host of genes that interact with health and lifestyle factors to influence a person’s chances of getting the disease.

The study revealed that certain variants of three genes — called TBC1D30, KANK1 and PAM — are associated with abnormal insulin production or processing, even in people without diabetes. The genes may predispose such individuals to developing the disease.

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