A diet rich in fibre may help improve blood sugar control and support metabolic health in people with recently diagnosed type 2 diabetes. The findings also point to possible changes in gut bacteria that could contribute to the body’s metabolic processes.
The study examined 48 adults who had recently been diagnosed with type 2 diabetes and were also living with overweight or obesity. Researchers compared the results of a high-fibre dietary programme with those of metformin treatment over 84 days.
What the Study Found
At the end of the 84-day period, participants following the high-fibre diet showed a greater improvement in average blood sugar levels, measured using HbA1c, and in body mass index compared with the group receiving metformin alone.
Researchers also observed changes in the gut microbiome among participants following the dietary programme. By day 28, levels of certain beneficial bacteria, including Bifidobacterium and Lactobacillus, had increased.
The findings suggest that dietary fibre may influence both blood sugar regulation and the community of microorganisms living in the digestive system.
Which Foods Provide Dietary Fibre?
Fibre is found in a wide range of everyday foods, making it possible to increase intake without relying on specialised products.
Beans, lentils, chickpeas, peas, oats, whole grains, vegetables, nuts, seeds and whole fruits are useful sources. Including a variety of these foods in regular meals can help provide different types of fibre along with other nutrients.
People who want to increase their fibre intake are generally advised to do so gradually and drink enough fluids, as a sudden change can cause digestive discomfort.
Why Gut Health Is Part of the Discussion
The gut microbiome plays a role in digestion and several processes connected with metabolism. Researchers are increasingly studying how dietary patterns influence gut bacteria and whether these changes may be relevant to conditions such as type 2 diabetes.
However, changes in gut bacteria do not automatically prove that a particular diet will prevent or reverse a disease. More research is needed to understand which foods and types of fibre may offer the greatest benefits.
Important Limitations to Keep in Mind
The study was small, involving just 48 participants, and lasted 84 days. Larger and longer studies are needed to determine whether the results apply to broader populations and whether the benefits continue over time.
The findings do not mean that people with diabetes should stop or replace prescribed medication with a high-fibre diet. Dietary changes should form part of an individualised care plan discussed with a qualified healthcare professional.
Overall, the research adds to evidence that fibre-rich foods may be a valuable part of a balanced diet and a broader approach to managing blood sugar levels.
