Diabetes is a condition that affects the body’s ability to use blood sugar for energy. The three types are type 1, type 2, and gestational diabetes.

Doctors usually diagnose type 1 diabetes in childhood, although it can occur in adults also. Type 1 diabetes affects the body’s ability to produce insulin. This hormone is vital to helping the body utilize blood sugar. Without enough insulin, the extra blood sugar can damage the body. According to the , 5 percent of all people with diabetes have type 1 diabetes.

Type 2 diabetes is a condition that affects a body’s ability to use insulin properly. Unlike people with type 1 diabetes, people with type 2 diabetes make some insulin. However, they can’t make enough to keep up with rising blood sugar levels. Doctors associate type 2 diabetes with lifestyle-related factors like obesity.

Gestational diabetes is a condition that causes women to have very high blood sugar levels during pregnancy. This condition is typically temporary.

Having risk factors does not mean that someone will get diabetes.

Doctors don’t know the exact cause of type 1 diabetes. Family history of type 1 diabetes is considered a risk factor. According to the , the child of a man with type 1 diabetes has a 1 in 17 chance of developing type 1 diabetes. If a woman has type 1 diabetes, her child has a 1 in 25 chance if the child was born when the woman was younger than 25. Women with type 1 diabetes who give birth at age 25 or older have a 1 in 100 chance of having a child with type 1 diabetes.

Having a parent with type 2 diabetes also increases diabetes risk. Because diabetes is often related to lifestyle choices, parents may pass on poor health habits to their children. This increases their risk for getting types 2 diabetes.

People of certain ethnicities are also at higher risk for type 2 diabetes. This includes:

  • African-Americans
  • Native Americans
  • Asian-Americans
  • Pacific Islanders
  • Hispanic Americans

Women have an increased risk for gestational diabetes if they have a close family member who has diabetes.

Having a virus (type unknown) at an early age may trigger type 1 diabetes in some individuals. People are also more likely to have type 1 diabetes if they live in a cold climate. Doctors also diagnose patients with type 1 diabetes in the winter more often than the summer.

Type 1 diabetes may have some diet-related factors. According to the , babies who were not breastfed are at an increased risk for diabetes. The same is true for babies that were given solid foods at an early age.

Type 2 diabetes is often lifestyle-related. Lifestyle factors that increase risk include:

  • obesity
  • physical inactivity
  • smoking
  • unhealthy diet

According to the , obesity is the single greatest risk factor for type 2 diabetes.

People are more likely to experience type 2 diabetes if they have the following conditions:

  • acanthosis nigricans, a skin condition that makes the skin appear darker than usual
  • hypertension (high blood pressure) greater than 140/90 mm Hg
  • high cholesterol
  • polycystic ovary syndrome (PCOS)
  • prediabetes or blood sugar levels that are higher than normal, but not at diabetes levels
  • triglyceride levels that are 250 or greater

Women with gestational diabetes that give birth to a baby weighing 9 pounds or more are at greater risk for developing type 2 diabetes.

People are more likely to get diabetes as they age. According to the , an estimated 27 percent of United States citizens age 65 and older have diabetes.

recommend adults ages 45 and older get a diabetes test. This is especially true if a person is overweight.

A common misconception about diabetes is that vaccines cause diabetes. According to the , there is no evidence to support this claim.