Dietary fibre is the part of plant foods your body cannot digest — and that is exactly the point. It slows the release of sugar into the blood, feeds the bacteria in your gut, adds the bulk that keeps you regular, and helps carry cholesterol out of the body. Most people eat barely half the recommended amount. Wholegrains, pulses, vegetables, fruit, nuts and seeds are the foods that close the gap, and few dietary changes pay off across as many health markers at once.
What is Dietary Fibre?
Dietary Fibre is a plant fibre that plays a critical role in slowing digestion, feeding the gut microbiome and steadying the release of sugar into the blood. While many general diets overlook it, maintaining optimal levels of Dietary Fibre is frequently tracked by people working to optimize their HbA1c.
Top Foods High in Dietary Fibre
A data-driven breakdown of the foods with the highest concentration of Dietary Fibre per 100 g.
| Food | Dietary Fibre | % DV |
|---|---|---|
| Flaxseed | 23.13 g | 82.6% |
| Turmeric | 22.7 g | 81.1% |
| Barley | 15.6 g | 55.7% |
| Black Beans | 15.5 g | 55.4% |
| Pinto Beans | 15.5 g | 55.4% |
| Kidney Beans | 15.2 g | 54.3% |
| Sesame Seeds | 11.8 g | 42.1% |
| Dark Chocolate (70–85%) | 10.9 g | 38.9% |
| Almonds | 10.78 g | 38.5% |
| Oats | 10.1 g | 36.1% |
| Buckwheat | 10 g | 35.7% |
| Hazelnuts | 8.41 g | 30% |
| Sunflower Seeds | 7.22 g | 25.8% |
| Quinoa | 7 g | 25% |
| Pistachios | 6.97 g | 24.9% |
| Peanut Butter | 6.32 g | 22.6% |
How Dietary Fibre Impacts HbA1c
Research links diets rich in Dietary Fibre to changes in HbA1c. Diets naturally abundant in this compound often support lower HbA1c markers by slowing how quickly carbohydrate is absorbed, which blunts blood-sugar spikes and, over months, eases the average that HbA1c reflects.
Scientific references & clinical evidence
This guide is built on peer-reviewed research — verify the primary sources below.
Written by the Nutrition Encyclopedia team · medically reviewed by Dr. Sunaina Tariq, MBBS
Last updated 31 July 2026
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