Scientists found that the diet could reduce cholesterol – a significant cause of heart disease – by a third and bring blood pressure down by nearly a tenth.
But rather than just a narrow range of foods being responsible for boosting health, the research showed that the answer was a widely varied diet that might include oily fish, porridge oats and blueberries.
Nutritionist Angela Dowden said: “The key is definitely to introduce these kinds of foods into the diet. It is a very healthy diet and completely proves the point that it is about healthy eating as a whole, not just doing one thing.
“It is a lifestyle change instead of tweaks here and there. It could be that it is just one of the foods that is producing these effects but it is