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Diabetes and Parkinson’s

A number of research studies have looked at the connection between Parkinson’s disease (PD) and type 2 diabetes. Type 2 diabetes is a disease in which the blood glucose (sugar) levels are too high. Insulin is the hormone in the body that helps move the glucose into the cells for energy. In people with type 2 diabetes, the body does not use insulin well. This is also known as insulin resistance. Over time, the high levels of glucose in the blood causes serious problems, damaging eyes, kidneys, and nerves, and increasing the risk of heart disease, stroke, and loss of limbs due to amputation.1

People with diabetes have increased risk of Parkinson’s disease

Studies have shown that people with type 2 diabetes have an increased risk of developing PD. Type 2 diabetes also increases the risk of a person developing Alzheimer’s disease.2,3

Prevalence of diabetes in people with Parkinson’s

Due to the increased risk of developing PD among people with diabetes, it is no surprise that the prevalence of diabetes is higher among people with PD than in non-PD people. It is estimated that between 8-30% of people with PD have diabetes. In addition, 50-80% of people with PD have abnormal glucose tolerance tests. Glucose tolerance tests measure the body’s ability to use glucose (sugar). Abnormal results may indicate diabetes or pre-diabetes, a condition that indicates a person is at risk of progressing to type 2 diabetes. Diabetes seems to accelerate the progression of both motor and non-motor symptoms of PD.4,5

Reducing your risk of developing diabetes

There are ways to lower the risk of developing diabetes. The American Diabetes Association recommends maintaining a healthy weight, eating healthy, and getting regular physical exercise. These healthy lifestyle activities are also important for people with PD to maintain their health and manage their symptoms from PD.6

Written by: Emily Downward | Last reviewed: March 2017
  1. Medline Plus, U.S. National Library of Medicine. Accessed online on 2/28/17 at
  2. Hu G, Jousilahti P, Bidel S, Antikainen R, Tuomilehto J. Type 2 Diabetes and the Risk of Parkinson's Disease. Diabetes Care Apr 2007, 30(4):842-847. doi: 10.2337/dc06-2011
  3. Diabetes UK. Accessed online on 2/28/17 at
  4. Medscape. Accessed online on 2/28/17 at
  5. MedlinePlus, U.S. National Library of Medicine. Accessed online on 2/28/17 at
  6. American Diabetes Association. Accessed online on 2/28/17 at