Low-carbohydrate diet for normalizing blood sugar in type 2 diabetes

Normalized Glucose Levels in Type 2 Diabetes With Carbohydrate or Caloric Restriction: a Randomized Controlled Trial (CarborCal)

Not applicable Interventional Region Stockholm · NCT05801614

This study tests if a low-carbohydrate diet can help people with type 2 diabetes lower their blood sugar levels better than traditional calorie counting.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment286 (estimated)
Ages24 Years to 70 Years
SexAll
SponsorRegion Stockholm Government
Locations1 site (Stockholm)
Trial IDNCT05801614 on ClinicalTrials.gov

What this trial studies

This randomized controlled trial aims to evaluate the effectiveness of a low-carbohydrate diet in normalizing blood glucose levels in patients with a short duration of type 2 diabetes. The study compares this approach to traditional caloric restriction, which can be challenging to maintain. Participants will be monitored over a period of 15 months to assess changes in HbA1c levels, which are crucial for preventing diabetes-related complications. The trial seeks to provide a less restrictive dietary alternative that can be integrated into a healthy lifestyle.

Who should consider this trial

Good fit: Ideal candidates are individuals diagnosed with type 2 diabetes for less than 6 years, with a BMI of 27 kg/m2 or higher.

Not a fit: Patients with severe insulin deficiency or those with HbA1c levels of 12% or more may not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could offer a sustainable dietary option for patients to manage their blood glucose levels effectively.

How similar studies have performed: Previous studies have shown that caloric restriction can normalize blood glucose levels in many patients, suggesting potential success for this less restrictive dietary approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* HbA1c \> 48 mmol/mol (with or without medical treatment);
* less than 6 years since the diagnosis of T2D
* BMI ≥ 27 kg/m2 (≥ 25 kg/m2 for Asians).

Exclusion Criteria:

* Insulin deficiency.
* HbA1c concentration of 12% or more (≥108 mmol/mol),
* treatment with sulphonyl urea or sodium-glucose-cotrasporter2-inhibitor (SGL2-i),
* myocardial infarction within the previous 6 months,
* severe or unstable heart failure
* other severe diseases including cancer, psychiatric/eating disorders, severe depression - substance abuse,
* conditions that may affect the ability of patients to participate in the study

Where this trial is running

Stockholm

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Diabetes Mellitus Type 2 in ObeseDiabetes Mellitus Type 2DietCarbohydrate-RestrictedCaloric restriction
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.