Health
Eating for steadier blood sugar
The basics of eating with type 2 diabetes or prediabetes: there is no single diabetes diet, but fibre, carbohydrate quality and drinks matter. General principles, not treatment.
No single diabetes diet
Diabetes UK says there is no one-size-fits-all diet for diabetes, and the American Diabetes Association’s 2026 Standards of Care agree: there is no ideal percentage of calories from carbohydrate, protein or fat. Mediterranean, DASH, low-fat, lower-carbohydrate, vegetarian and vegan patterns are all among those it lists as evidence-based.
What those patterns share matters more than their labels: plenty of non-starchy vegetables, whole fruit, pulses, wholegrains, nuts and seeds, with less red meat, sugary drinks, sweets, refined grains and heavily processed food. Which version you follow should depend on your preferences and your health goals.
Carbohydrate: type and amount
All carbohydrate affects blood glucose, so both the type and the portion count. The ADA advises minimally processed, high-fibre sources, at least 14 g of fibre per 1,000 kcal, and replacing sugar-sweetened drinks, including juice, with water. Diabetes UK suggests wholegrains, pulses, fruit, vegetables and unsweetened dairy as the carbohydrate foods to choose.
A meta-analysis of 42 trials found that raising fibre intake lowered HbA1c by about 2 mmol/mol and fasting glucose by about 0.6 mmol/L, although results varied a lot between trials. The ADA also says reducing carbohydrate can be considered for some adults to improve glucose levels, with medical oversight if intake is very low.
Building a plate
A simple start is the ADA’s plate method: on a nine-inch plate, fill half with non-starchy vegetables, a quarter with lean protein and a quarter with quality carbohydrate such as wholegrains, starchy vegetables, fruit or low-fat dairy. For drinks, its advice is water or zero-calorie options.
On this site, use the fibre and sugar filters in recipe search and check the carbohydrate per serving on each recipe. If you count carbohydrate to dose insulin, remember that our figures are estimates calculated from ingredients, not laboratory values.
Weight and activity
For many people living with overweight and type 2 diabetes, the ADA notes that losing at least 5% of body weight is needed to see benefits in glucose, blood fats and blood pressure, and that benefits grow with further loss. Diabetes UK recommends at least 150 minutes of moderate activity a week.
Worth knowing
- This is general information for adults and does not replace advice from your diabetes team or a dietitian. Food choices do not cure diabetes, and nothing here is a reason to change or stop medication.
- If you take insulin or other glucose-lowering medicines, eating less carbohydrate, fasting or dieting can cause low blood sugar. Speak to your clinician before changing how you eat.
- Very-low-carbohydrate and ketogenic diets need medical supervision in diabetes, and the ADA says they should be avoided by people taking SGLT2 inhibitors.
Common questions
Can I still eat fruit?
Yes. Diabetes UK recommends whole fruit for people with diabetes as for everyone else. Spread it across the day, and go for whole fruit over juice, which counts as free sugar.
Do I need special diabetic foods?
No. Diabetes UK advises against them: there is no evidence of a special benefit, they can still affect blood glucose, and labelling food as “diabetic” is no longer allowed.
Is low-carb the best diet for type 2 diabetes?
It is one accepted option, not the only one. The ADA says reducing carbohydrate can improve glucose for some adults. Check with your clinician first if you take medication.
Sources
- American Diabetes Association: Standards of Care in Diabetes 2026, section 5, Facilitating Positive Health Behaviors and Well-being
- American Diabetes Association: Tips for Eating Well (Diabetes Plate)
- Diabetes UK: 10 tips for healthy eating with diabetes
- Dietary fibre and whole grains in diabetes management: systematic review and meta-analyses, PLoS Med (2020)
General information, not medical or dietary advice. Speak to a doctor or registered dietitian about your own situation.
