Video report by ITV News Anglia's Liz Summers
Dogs could be used to sniff out Parkinson's disease years before symptoms start to show, according to a research charity in Milton Keynes.
Medical Detection Dogs is working on a study - in collaboration with Parkinson's UK - to see if there are odour molecules linked to the neurological condition so dogs can be trained to identify them in patient swabs in future.
More than 120,000 people are affected by Parkinson's in the UK.
Dr Beckie Port from Parkinson's UK says the research could be very significant to identifying and treating Parkinson's in the early stages.
There are three main symptoms of Parkinson's:
Tremor- Involuntary shaking movement in a part of your body
Slowness- Movements are slower or less co-ordinated
Rigidity- Stiff or inflexible muscles