Most organs in the body remove waste with the help of the lymphatic system, but the brain uses a different plumbing system.
Cerebrospinal fluid depends on the dust in the arteries to actively flush the brain, collecting debris, a mechanism known as the lymphatic system.
When this system fails, superfluous proteins accumulate between the neurons in the organ, frustrating communication between cells.
Vitamin D, thanks to its neuroprotective qualities, is believed to protect brain cells from damage.