"A small, early study hints that a skin test may someday be able to help diagnose people with Alzheimer's and Parkinson's diseases.
Researchers found that skin biopsies can reveal elevated levels of abnormal proteins associated with the two disorders.
Compared to healthy people and those with non-Alzheimer's dementia, the Alzheimer's and Parkinson's patients had seven times higher levels of a protein called tau. The researchers also found that Parkinson's patients had eight times higher levels of a protein called alpha-synuclein, compared with healthy people.
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