Think having a soda once or twice a week isn't a big deal? Think again. According to a new study, drinking just two sodas per week can double your risk of developing pancreatic cancer.

Researchers followed 60,000 men and women for 14 years. They found that people who drank two or more sodas per week had an 87 percent increased risk of suffering pancreatic cancer (compared to people who didn't regularly drink soda).

Drinking soda is just bad news. It contains so much sugar that your body must unleash massive amounts of insulin to metabolize it. This overproduction of insulin – scientists believe – puts a strain on the pancreas, which may contribute to the growth of pancreatic cancer cells.

It's true that pancreatic cancer is very rare. But it's one of the most deadly. In fact, only about five percent of men and women diagnosed with it survive five years.

So the next time you feel like having a soda at the movies. Skip it. Order bottled water instead!