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Research Summary
Analyzed using Evidence Intelligence™

Low-carbohydrate diets may improve diabetes control in type 1 diabetes

Powered by the Dediabetes Evidence Intelligence™ framework

Last updated August 22, 2026

Key finding

Capillary blood glucose levels improved significantly with adherence to the low-carbohydrate diet.

This case-control study explored the effects of a low-carbohydrate diet on individuals with type 1 diabetes mellitus, revealing significant improvements in blood glucose and HbA1c levels.

Quick read

Study at a glance

The essential study design details in one scan.

EvidenceScore™

Moderate

Study type

Case-Control

Follow-up

Extended (5–20+ y)

Risk of bias

High Risk

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Plain-language summary

What this paper says

A plain-language read of the study’s main message and where it applies.

Study focus

This case-control study explored the effects of a low-carbohydrate diet on individuals with type 1 diabetes mellitus, revealing significant improvements in blood glucose and HbA1c levels.

Clinical relevance

These findings are significant as they suggest that dietary modifications, specifically low-carbohydrate diets, can play a crucial role in managing type 1 diabetes. Improved glycemic control can lead to better long-term health outcomes, reducing the risk of diabetes-related complications. This study highlights the importance of considering dietary approaches in diabetes care.

Keep in mind

The study had a small sample size, limiting generalizability. Long-term effects beyond 16 months were not assessed. No control group was included for comparison.

Published in

Journal Reference

Publication details and source links for this paper.

Hakan O, Phoenix G, Pam D, Garry DT, Fredrik K. The potential of low-carbohydrate diets in type 1 diabetes mellitus: a case report. Endocrinology, Diabetes & Metabolism Case Reports. 2024;2024(1):23-0130. doi:10.1530/EDM-23-0130

View DOIView on PubMedView on PMC

Main Effects

HbA1c decreased from 103 (11.6%) to 39 (5.7%) after 16 months on the diet.

Capillary blood glucose levels improved significantly with adherence to the low-carbohydrate diet.

Total cholesterol peaked at 10.8 mmol/L after 16 months on the diet.

Evidence network

How this study fits

Understand where this research contributes within the broader evidence network.

Evidence Context

This study contributes evidence to Low-carbohydrate diet and Blood glucose, C-peptide, HDL cholesterol, and 5 more.

This study contributes evidence to

Intervention

Low-carbohydrate diet

Outcome

Blood glucose

Evidence topic

Dietary Patterns

Primary intervention

Low-carbohydrate diet

Primary outcomes

  • Blood glucose
  • C-peptide
  • HDL cholesterol

Evidence topics

Dietary PatternsInsulin ResistanceGlycemic ControlHbA1c Reduction

Primary intervention

Low-carbohydrate diet

Primary outcomes

Blood glucoseC-peptideHDL cholesterol

Evidence relationships

Intervention and outcome relationships this study adds to the evidence network.

8
Evidence pairs
8
Relationships
4
Evidence topics
contributes_evidence

Editorial context

Why this study matters

See why this paper is useful beyond its individual results.

Evidence network role

This section describes how the study fits into the current evidence network. It does not determine whether an intervention works on its own.

Moderate contributionModerate confidenceNetwork score: 68

4

Related topics

8

Evidence pairs

1502

Related studies

High relevance in at least one topic

Why it is useful

  • Contributes to 8 evidence relationships
  • Includes primary outcome data
  • Linked to 4 direct semantic evidence topics

Topic contributions

Evidence topic

Contributes evidence

Evidence topic

Contributes evidence

Evidence topic

Contributes evidence

Evidence topic

Contributes evidence

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Primary evidence

Evidence relationship

Low-Carbohydrate Diet Education and HbA1c

Related evidence

Evidence relationship

Low-Carbohydrate Diet Education and Fasting Glucose

Save evidence

Evidence relationship

Low-Carbohydrate Diet Education and Adipokine and Angiogenic Markers

Save evidence

Core evidence

Study findings

The primary outcomes reported in this study.

Blood glucose

Low-carbohydrate diet → Blood glucose

Low-carbohydrate diet → Blood glucose

Evidence Intelligence™
EvidenceScore™
56
Emerging
ImpactScore™
86
Very Positive
ConsistencyScore™
100
consistent
Supporting studies: Based on 2 studies
Add to Evidence Tracker

C-peptide

Low-carbohydrate diet → C-peptide

Low-carbohydrate diet → C-peptide

Evidence Intelligence™
EvidenceScore™
31
Limited
ImpactScore™
50
Neutral
ConsistencyScore™
unclear
Not enough independent studies
Supporting studies: Based on 1 study
Add to Evidence Tracker

HbA1c

Low-carbohydrate diet → HbA1c

Low-carbohydrate diet → HbA1c

Evidence Intelligence™
EvidenceScore™
82
Strong
ImpactScore™
86
Very Positive
ConsistencyScore™
75
consistent
Supporting studies: Based on 13 studies
Add to Evidence Tracker

HDL cholesterol

Low-carbohydrate diet → HDL cholesterol

Low-carbohydrate diet → HDL cholesterol

Evidence Intelligence™
EvidenceScore™
56
Emerging
ImpactScore™
86
Very Positive
ConsistencyScore™
35
mixed
Supporting studies: Based on 2 studies
Add to Evidence Tracker

LDL cholesterol

Low-carbohydrate diet → LDL cholesterol

Low-carbohydrate diet → LDL cholesterol

Evidence Intelligence™
EvidenceScore™
31
Limited
ImpactScore™
50
Neutral
ConsistencyScore™
unclear
Not enough independent studies
Supporting studies: Based on 1 study
Add to Evidence Tracker

Total cholesterol

Low-carbohydrate diet → Total cholesterol

Low-carbohydrate diet → Total cholesterol

Evidence Intelligence™
EvidenceScore™
31
Limited
ImpactScore™
50
Neutral
ConsistencyScore™
unclear
Not enough independent studies
Supporting studies: Based on 1 study
Add to Evidence Tracker

Triglycerides

Low-carbohydrate diet → Triglycerides

Low-carbohydrate diet → Triglycerides

Evidence Intelligence™
EvidenceScore™
31
Limited
ImpactScore™
50
Neutral
ConsistencyScore™
unclear
Not enough independent studies
Supporting studies: Based on 1 study
Add to Evidence Tracker

α-hydroxybutyrate

Low-carbohydrate diet → α-hydroxybutyrate

Low-carbohydrate diet → α-hydroxybutyrate

Evidence Intelligence™
EvidenceScore™
31
Limited
ImpactScore™
50
Neutral
ConsistencyScore™
unclear
Not enough independent studies
Supporting studies: Based on 1 study
Add to Evidence Tracker

Evidence Library

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evidence suggest

Evidence Suggest

  • HbA1c levels significantly decreased by 63 mmol/mol.
  • Capillary blood glucose levels improved with diet adherence.
  • Total cholesterol levels increased to 10.8 mmol/L after 16 months.
who this applies

Who this applies to

  • Individuals diagnosed with type 1 diabetes mellitus.
  • Patients seeking dietary interventions for diabetes management.
keep in mind

Keep in Mind

  • Results may not apply to all populations with type 1 diabetes.
  • The study did not include a control group for comparison.
  • Long-term safety and efficacy of the diet were not evaluated.
between the lines

Between the Lines

  • The study had a small sample size, limiting generalizability.
  • Long-term effects beyond 16 months were not assessed.
  • No control group was included for comparison.

Evidence Library

Build your evidence library

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Connected Evidence

Explore related studies, evidence collections, and research questions.

Relationships organized using the Dediabetes Evidence Intelligence™ framework.

Powered by the Dediabetes Evidence Intelligence™ framework

This study contributes to evidence on Low-Carbohydrate Diet Education and HbA1c, Low-Carbohydrate Diet Education and Fasting Glucose.

Related evidence relationships

Explore in Evidence Explorer

This study contributes to the evidence on the following intervention-outcome relationships.

Questions answered by this study

Generated from the study's connected evidence using Evidence Intelligence™.

Does Low-Carbohydrate Diet Education improve HbA1c?

Strong Evidence

Low-Carbohydrate Diet Education appears to improve HbA1c.

ConsistencyScore™: Results are consistent across studies.

Ranked evidence signals

  1. 1

    HbA1c

    EvidenceScore™ Strong | EvidenceScore™ 82.0 | strong positive | ConsistencyScore™ Consistent | 1 study

Why this answer: This answer is based on 14 supporting studies with consistent results and a positive effect signal.

Limitations

  • Population details are unavailable.
14 supporting studiesUpdated: Aug 2026
View Full Evidence

Does Low-Carbohydrate Diet Education improve fasting glucose?

Strong Evidence

Low-Carbohydrate Diet Education appears to improve Fasting Glucose.

ConsistencyScore™: Results are consistent across studies.

Ranked evidence signals

  1. 1

    Blood glucose

    EvidenceScore™ Emerging | EvidenceScore™ 56.1 | strong positive | ConsistencyScore™ Consistent | 1 study

Why this answer: This answer is based on 6 supporting studies with consistent results and a positive effect signal.

Limitations

  • Population details are unavailable.
6 supporting studiesUpdated: Aug 2026
View Full Evidence

Does Low-Carbohydrate Diet Education improve adipokine and angiogenic markers?

Emerging Evidence

Low-Carbohydrate Diet Education appears to improve Adipokine and Angiogenic Markers.

ConsistencyScore™: Results are mixed and should be interpreted cautiously.

Evidence caveat: The available evidence reports mixed findings.

Ranked evidence signals

  1. 1

    HDL cholesterol

    EvidenceScore™ Emerging | EvidenceScore™ 56.1 | strong positive | ConsistencyScore™ Mixed | 1 study

  2. 2

    LDL cholesterol

    EvidenceScore™ Limited | EvidenceScore™ 31.3 | neutral | ConsistencyScore™ Unclear | 1 study

  3. 3

    Total cholesterol

    EvidenceScore™ Limited | EvidenceScore™ 31.3 | neutral | ConsistencyScore™ Unclear | 1 study

Why this answer: This answer is cautious because the available studies report mixed findings.

Limitations

  • Only a small number of supporting studies are available.
  • Population details are unavailable.
2 supporting studiesUpdated: Aug 2026
View Full Evidence

Does Low-carbohydrate diet improve c-peptide?

Limited Evidence

Current evidence does not show a clear benefit of Low-carbohydrate diet for C-peptide.

ConsistencyScore™: Consistency cannot yet be determined from the available evidence.

Ranked evidence signals

  1. 1

    C-peptide

    EvidenceScore™ Limited | EvidenceScore™ 31.3 | neutral | ConsistencyScore™ Unclear | 1 study

Why this answer: This answer is based on a single supporting study.

Limitations

  • Only one supporting study is available.
  • Consistency cannot yet be determined.
  • Population details are unavailable.
1 supporting studyUpdated: Aug 2026
View Full Evidence
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Next steps

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Evidence topics

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Dietary Patterns Evidence HubInsulin Resistance Evidence HubGlycemic Control Evidence HubHbA1c Reduction Evidence Hub

Explore in Evidence Explorer

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All studies on Low-carbohydrate diet and HbA1cAll studies on Low-carbohydrate diet and Blood glucoseAll studies on Low-carbohydrate diet and HDL cholesterolAll studies on Low-carbohydrate diet and C-peptide

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