Vitamin D and Brain Health in Alzheimer and Parkinson Disease

Vitamin D is necessary for our body and brain to function. When the vitamin D level in our body is too low, it can cause health problems. A low vitamin D level is also called vitamin D deficiency or insufficiency. Low vitamin D is more common in older people, overweight individuals, and those who live in nursing homes or hospitals.1 People with Alzheimer (AD) and Parkinson disease (PD) have lower vitamin D levels than people of the same age without AD or PD.2,3