Scientists did tests on mice. They showed that fasting can be healthy. Fasting is eating little or nothing for a day or two. It can help diabetes, heart disease and cancer. The scientists gave the mice low-calorie food for four days. Then the mice had 10% of their normal food for three days. This helped the pancreas in the mice.

The pancreas makes insulin in our body. Insulin breaks down sugar in the blood. People with diabetes have too much sugar. They have health problems and can die. People with diabetes do not produce any insulin or do not produce enough. Scientists said fasting made more insulin. They now want to do the tests on humans.