Gut, Sleep, And Smell: 3 Signs Linked To A 23x Higher Parkinson's Risk

They were seen years before diagnosis.

In the UK, Parkinson’s affects around 166,000 adults. And Parkinson’s UK writes that the disease is “on the rise” – as our population gets bigger and older, some expect that figure to reach 173,000 by 2030.

Like dementia, there is no single test that can conclusively diagnose Parkinson’s. This is a shame, because early diagnosis and treatment can improve outcomes and quality of life.

To help health professionals spot Parkinson’s risk earlier, some scientists have looked into gut changes that might reveal a higher likelihood of developing the condition.

A 2025 study found that men with a combination of three physical signs “had a 23-fold higher risk of receiving a [Parkinson’s] diagnosis in the subsequent three........

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