Researchers at the University of Leeds reviewed literature published since 1990 in healthy populations concerning dietary fibre intake and CVD risk.
They took data from six electronic databases. Cohorts of data were used from the US, Europe, Japan and Australia.
The study looked at the following fibre intake: total, insoluble (whole grains, potato skins etc), soluble (legumes, nuts, oats, barley etc), cereal, fruit, vegetable and other sources.
Results from analyses of total, insoluble, fruit and vegetable fibre intake showed that the likelihood of a CVD or CHD event steadily lowers with increasing intake.
In soluble fibre, a higher reduction was seen in CVD risk than CHD risk and for cereal fibre, the reduced risk of CHD was stronger than the association with CVD.
A significantly lower risk of both CVD and CHD was observed with every additional 7g per day of fibre consumed.
The researchers said these findings are aligned with current recommendations to increase fibre intake and demonstrate a large risk reduction with an achievable increase in daily fibre intake and said this could "potentially impact on many thousands of individuals."
They added that an additional 7g of fibre can be achieved through one portion of wholegrains (found in bread, cereal, rice, pasta) plus a portion of beans/lentils or two to four servings of fruit and vegetables.
The researchers concluded that "diets high in fibre, specifically from cereal or vegetable sources ... are significantly associated with lower risk of CHD and CVD and reflect recommendations to increase intake."
Greater intake from fruit fibre was associated with lower CVD risk. They recommend further work on the association with soluble or insoluble types of fibre.
The study was published in the British Medical Journal.