A Simple Blood Test Could Spot Parkinson’s Years Before Symptoms

Scientists in Sweden and Norway have uncovered a promising way to spot Parkinson’s disease years—possibly decades—before its most damaging symptoms appear. By detecting subtle biological signals in the blood tied to how cells handle stress and repair DNA, the team identified a brief early window when Parkinson’s quietly leaves a measurable fingerprint. The findings highlight a critical opportunity to both diagnose the disease earlier and explore treatments while the brain is still largely intact.