Type 2 diabetes: Study examines a high-fiber dietary program

A study involving 34 people newly diagnosed with type 2 diabetes reported beneficial effects on HbA1c and fasting blood glucose from a high-fiber dietary program that initially included energy restriction. The findings, reported by CNN Türk from nutritionist Dilara Koçak’s column in Milliyet Pazar, highlight an approach to diabetes management that considers food sources and fiber content alongside the amount of carbohydrate consumed.

Key findings from the study

The study, published in Food Research International, involved 34 people newly diagnosed with type 2 diabetes.
The dietary program was high in fiber and initially included energy restriction.
Beneficial effects on HbA1c and fasting blood glucose were reported.
Researchers are also investigating the possible role in glucose metabolism of compounds produced when gut bacteria break down fiber.

What dietary approach do the findings point to?

The study examined a dietary program combining high fiber intake with an initial period of energy restriction. The reported benefits therefore need to be considered in the context of the program as a whole, rather than attributed solely to a single food or to fiber intake. The measures tracked in the study included HbA1c and fasting blood glucose.

The broader approach described by Koçak considers overall eating habits, rather than individual foods, in diabetes prevention and management. Alongside carbohydrate quantity, research also focuses on food quality, fiber content and individual blood glucose responses to the same meal.

In this context, Mediterranean-style and plant-focused diets are described as scientifically supported approaches to diabetes prevention and management. One feature these dietary patterns share is the inclusion of fiber-rich foods.

How is the gut microbiota linked to blood glucose?

Microorganisms living in the gut play a role in metabolic mechanisms, including energy extraction from food and inflammatory processes. Short-chain fatty acids produced when gut bacteria ferment fiber are also thought to play a role in mechanisms related to glucose metabolism and insulin sensitivity. This link is presented as a mechanism under investigation, rather than a single, established explanation.

What this means for people with diabetes and those reviewing their diets

In practical terms, the dietary advice means making more room for fiber-rich foods in everyday meals. Koçak lists lentils, chickpeas, beans, vegetables and whole grains as options. Sprouted legumes are also presented as a way to add variety to the diet.

Frequently asked questions

Who took part in the study?

The study, published in Food Research International, involved 34 people newly diagnosed with type 2 diabetes. Beneficial effects on HbA1c and fasting blood glucose were reported with a high-fiber program that initially included energy restriction.

Which foods are recommended for fiber?

Dilara Koçak’s column recommends lentils, chickpeas, beans, vegetables and whole grains. Sprouted legumes are also mentioned as an option for adding variety.