https://doi.org/10.71450/64900277
Published: 23/05/2023
Peer reviewed by two members of Breast Cancer UK independent Science Panel.
All studies reviewed in this briefing have found a diet high in fibre is linked to a decreased breast cancer risk. The British Nutrition Foundation recommends the average adult consumes at least 30g of fibre per day. Dietary fibre has many effects on the body, especially on digestion and the composition of microorganisms in your gut. A varied diet rich in fibre, such as the Mediterranean diet – which includes high consumption of whole grains – supports a diverse and stable gut microbiome (the total population of gut microorganisms) and contributes significantly to gut health. Fibre may help prevent breast cancer through several proposed mechanisms which include preventing the reabsorption of oestrogens from the gut into the blood; binding oestrogen and thus increasing faecal excretion; and helping to reduce the risk of becoming overweight or obese.
Bischof P., Wexler M. Fibre, the gut microbiome and breast cancer. Breast Cancer UK. 2023. https://doi.org/10.71450/64900277
Next update: 23/05/2026
