Those trading at Exeter Livestock Market are being offered the checks in an outreach project by the local NHS.
The initiative is targeting those aged over 40 with the aim of detecting symptoms of illnesses such as heart disease and diabetes - so that they can be treated.
The checks will be extended to other markets in Devon in the future.
Funding crisis causes closures
Five teenagers arrested after North Devon fire
Murder investigation underway
North Devon house fire treated as arson
One person still missing
Cornwall charity is sending aid to hurricane victims
Teams help with devastation
Huge tuna caught off Devon breaks record
What a wopper!
Devon and Cornwall Police gets another bad report
Three out of three areas 'require improvement'
