Is intermittent fasting safe for people with diabetes?

People with diabetes—especially those on insulin, sulphonylureas or SGLT2 inhibitors—should consult their GP or diabetes specialist nurse before starting intermittent fasting because medication adjustments and monitoring may be needed. ([diabetes.org.uk](https://www.diabetes.org.uk/living-with-diabetes/eating/fasting?utm_source=openai))

Does time‑restricted eating improve blood glucose (mmol/L)?

Some trials report modest reductions in fasting glucose and fasting insulin when participants adhere to TRE, but results vary and many benefits are mediated by weight loss; monitor values in mmol/L with your clinician. ([pubmed.ncbi.nlm.nih.gov](https://pubmed.ncbi.nlm.nih.gov/35939311/?dopt=Abstract&utm_source=openai))

Which is better: TRE or continuous calorie restriction?

High‑quality RCTs and meta‑analyses generally find TRE produces similar weight loss to matched calorie restriction; adherence and personal preference usually determine which is best for an individual. ([nejm.org](https://www.nejm.org/doi/full/10.1056/NEJMoa2114833?utm_source=openai))

Can I join the NHS Diabetes Prevention Programme while trying IF?

Yes. The Healthier You NHS Diabetes Prevention Programme offers structured lifestyle support across England (and similar services are available in Scotland, Wales and Northern Ireland); discuss your plans with programme staff and your GP. ([england.nhs.uk](https://www.england.nhs.uk/diabetes/diabetes-prevention/?utm_source=openai))

Will intermittent fasting reduce my HbA1c to normal?

Some people may see modest HbA1c reductions alongside weight loss, but changes are individual. Regular monitoring (HbA1c reported in mmol/mol in the UK) is recommended and clinical decisions should be made with your GP. ([pmc.ncbi.nlm.nih.gov](https://pmc.ncbi.nlm.nih.gov/articles/PMC10630127/?utm_source=openai))

Intermittent fasting UK research benefits: What UK studies show (2026)

Author: Feras Alayed

Published: July 27, 2026

Updated: August 24, 2026

Category: british-health

Reading Time: 11 minutes

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