A four-month health pilot found 107 undiagnosed cases of high cholesterol and 65 of islanders with high blood pressure.
Public health services in partnership with Guernsey Chest and Heart LBG said the trial, which ran between September and December 2025, tested 265 islanders across 38 clinics in community and workplace settings.
The States of Guernsey said the project aimed to help people identify key risk factors of cardiovascular disease so they could take action before serious illness developed.
Caroline Ogier, CEO at Guernsey Chest and Heart LBG, said making checks outside of health facilities reached people that might otherwise have not been screened.
She said: “People followed up with their GP, some started treatment, and many made positive changes to their lifestyle.
“That’s exactly what prevention is about – giving people the information, confidence and support to take control of their health before cardiovascular disease develops.”