Huntington’s disease (HD) is a brain disease that is passed down in families from generation to generation. It is caused by a genetic error in the DNA sequence that codes for a specific protein, huntingtin. This error causes damage to the brain and leads to HD symptoms.

HD causes deterioration in a person’s physical, mental, and emotional abilities, usually during their prime working years, and currently has no cure. Most people start developing symptoms during adulthood, between the ages of 30 to 50, but HD can also occur in children and young adults (known as juvenile HD or JHD). HD is known as a family disease because every child of a parent with HD has a 50% chance of inheriting the defective gene. Today, there are approximately 41,000 symptomatic Americans and more than 200,000 at-risk of inheriting the disease.

Learn more about huntington’s:


HD Reach:

Huntington Study Group:

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