Resveratrol, which is also found in blueberries and peanuts, has been found to slow tumour growth in mice

Red wine was once heralded as a boon for health that could protect the heart and even extend life expectancy. But while scientists have debunked this claim, they believe that at least one red wine ingredient – a compound called resveratrol – may hold genuine health benefits.

A trial launched this week will assess whether a low dose of the chemical, also found in red grapes, blueberries and peanuts, could help keep bowel cancer at bay. The study, one of the largest to date testing drugs for cancer prevention, will recruit patients who are at risk of the disease.