NoneNo Change
Fasting blood sugar (FBS)
Standard anti-diabetic drugs only → Fasting blood sugar (FBS)
Standard anti-diabetic drugs only → Fasting blood sugar (FBS)
Evidence profile
NoneNo ChangeGlycemic Control
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Research Summary
Analyzed using Evidence Intelligence™
Vitamin D supplementation shows little effect on glycemic control in type 2 diabetes
Key finding
No significant difference was observed between the two groups in terms of HbA1c (p= 0.263).
This study investigated the effects of vitamin D supplementation on glycemic control in newly diagnosed type 2 diabetes patients. No significant differences were found between the vitamin D group and the standard anti-diabetic drugs group.
Evidence strength
Moderate confidence
Study type
RCTs
Follow-up
Medium-Term (3–12 mo)
Some Concerns bias
Last updated July 2, 2026Quick read
Study at a glance
The essential study design details in one scan.
Population
Young Adult (19–39), Middle Aged (40-64), Male, Female, Asia-Pacific (APAC), with T2 Diabetes
Intervention
Vitamin D supplementation, Standard anti-diabetic drugs only
Study type
RCTs
Follow-up
Medium-Term (3–12 mo)
Primary outcome
Glycated haemoglobin (HbA1c)
Comparator
Standard anti-diabetic drugs only
Plain-language summary
What this paper says
A plain-language read of the study's main message and where it applies.
Study focus
This study investigated the effects of vitamin D supplementation on glycemic control in newly diagnosed type 2 diabetes patients. No significant differences were found between the vitamin D group and the standard anti-diabetic drugs group.
Clinical relevance
Understanding the role of vitamin D in diabetes management is crucial, especially as many patients seek complementary therapies. This study's findings suggest that vitamin D supplementation alone may not be effective in improving glycemic control in newly diagnosed type 2 diabetes patients, which can guide clinicians in treatment planning and patient education.
Keep in mind
Limited sample size may affect generalizability Short duration of the study may not capture long-term effects Lack of diverse population representation
Published in
Journal Reference
Publication details and source links for this paper.
Alexander M, John RA, Kuldeep K, et al. Vitamin D Supplementation and Glycemic Control in Newly Diagnosed Type 2 Diabetes: A Randomized Controlled Trial. Cureus. 2024;16(9):e70224. doi:10.7759/cureus.70224
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Main Effects
No significant difference in HbA1c levels (p=0.263)
No significant change in fasting blood sugar levels (p=0.734)
No significant change in insulin resistance levels (p=0.899)
Evidence network
How this study fits
Understand where this research contributes within the broader evidence network.
Evidence Context
This study contributes evidence to Standard anti-diabetic drugs only, Vitamin D supplementation and Fasting blood sugar (FBS), Fasting insulin levels, Glucose iAUC (OGTT), and 2 more.
This study contributes evidence to
Primary intervention
Standard anti-diabetic drugs only
Primary outcomes
- Fasting blood sugar (FBS)
- Fasting insulin levels
- Glucose iAUC (OGTT)
Primary intervention
Evidence relationships
Intervention and outcome relationships this study adds to the evidence network.
10
Evidence pairs
10
Relationships
5
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
5
Related topics
10
Evidence pairs
582
Related studies
High relevance in at least one topic
Why it is useful
- Contributes to 10 evidence relationships
- Includes primary outcome data
- Linked to 5 direct semantic evidence topics
Topic contributions
Evidence topic
Contributes evidence
Evidence topic
Contributes evidence
Evidence topic
Contributes evidence
Evidence topic
Contributes evidence
Core evidence
Study findings
The primary outcomes reported in this study.
NoneNo Change
Fasting insulin levels
Standard anti-diabetic drugs only → Fasting insulin levels
Standard anti-diabetic drugs only → Fasting insulin levels
Evidence profile
NoneNo ChangeMetabolic Health
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NoneNo Change
Glucose iAUC (OGTT)
Standard anti-diabetic drugs only → Glucose iAUC (OGTT)
Standard anti-diabetic drugs only → Glucose iAUC (OGTT)
Evidence profile
NoneNo ChangeGlycemic Control
Unlock full evidence details
NoneNo Change
HbA1c
Standard anti-diabetic drugs only → HbA1c
Standard anti-diabetic drugs only → HbA1c
Evidence profile
NoneNo ChangeGlycemic Control
Unlock full evidence details
NoneNo Change
Insulin resistance
Standard anti-diabetic drugs only → Insulin resistance
Standard anti-diabetic drugs only → Insulin resistance
Evidence profile
NoneNo ChangeMetabolic Health
Unlock full evidence details
NoneNo Change
Fasting blood sugar (FBS)
Vitamin D supplementation → Fasting blood sugar (FBS)
Vitamin D supplementation → Fasting blood sugar (FBS)
Evidence profile
NoneNo ChangeGlycemic Control
Unlock full evidence details
NoneNo Change
Fasting insulin levels
Vitamin D supplementation → Fasting insulin levels
Vitamin D supplementation → Fasting insulin levels
Evidence profile
NoneNo ChangeMetabolic Health
Unlock full evidence details
NoneNo Change
Glucose iAUC (OGTT)
Vitamin D supplementation → Glucose iAUC (OGTT)
Vitamin D supplementation → Glucose iAUC (OGTT)
Evidence profile
NoneNo ChangeGlycemic Control
Unlock full evidence details
NoneNo Change
HbA1c
Vitamin D supplementation → HbA1c
Vitamin D supplementation → HbA1c
Evidence profile
NoneNo ChangeGlycemic Control
Unlock full evidence details
NoneNo Change
Insulin resistance
Vitamin D supplementation → Insulin resistance
Vitamin D supplementation → Insulin resistance
Evidence profile
NoneNo ChangeMetabolic Health
Unlock full evidence details
Unlock full evidence analysis
Create a free account to access effectiveness ratings, evidence strength and depth scores, consistency analysis, and direct links to all supporting studies.
Evidence Suggest
- Vitamin D supplementation did not improve HbA1c levels (p=0.263)
- Fasting blood sugar levels remained unchanged (p=0.734)
- Insulin resistance showed no significant improvement (p=0.899)
Who this applies to
- Adults newly diagnosed with type 2 diabetes
- Patients seeking additional therapies for glycemic control
Keep in Mind
- Results may not apply to populations outside the study's demographic
- Further research is needed to explore long-term effects of vitamin D
- The study did not assess potential interactions with other treatments
Between the Lines
- Limited sample size may affect generalizability
- Short duration of the study may not capture long-term effects
- Lack of diverse population representation
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Connected Evidence
Explore related studies, evidence collections, and research questions.
Relationships organized using the Dediabetes Evidence Intelligence™ framework.
This study contributes to evidence on Vitamin D supplementation and HbA1c, Vitamin D supplementation and Insulin Resistance.
Related evidence relationships
Explore in Evidence ArchiveThis study contributes to the evidence on the following intervention-outcome relationships.
Included in these evidence collections
Curated evidence collections and hubs this study is part of.
HbA1c Evidence Hub
All studies measuring HbA1c
5 studies
outcome_hubMeasures HbA1c as a key outcome.
Vitamin D supplementation Evidence Hub
All studies on Vitamin D supplementation
5 studies
intervention_hubContributes to Vitamin D supplementation evidence base.
Insulin Resistance Evidence Hub
All studies measuring Insulin Resistance
4 studies
outcome_hubMeasures Insulin Resistance as a key outcome.
Recent Diabetes Research
Latest published studies
recency_collection
Published within the last 2 years.
Explore more in the evidence archive
Jump to pre-filtered views in the evidence archive.
All studies on Vitamin D supplementation and HbA1c
Intervention: Vitamin D supplementationOutcome: HbA1c
5 results
All studies on Vitamin D supplementation and Fasting insulin levels
Intervention: Vitamin D supplementationOutcome: Fasting insulin levels
4 results
All studies on Vitamin D supplementation
Intervention: Vitamin D supplementation
5 results
All studies measuring HbA1c
Outcome: HbA1c
5 results
All studies measuring Fasting insulin levels
Outcome: Fasting insulin levels
4 results
Questions answered by this study
Generated from the study's connected evidence using Evidence Intelligence™.
Does Alpha-glucosidase inhibitors improve postprandial and ogtt glucose?
Emerging Evidence
Alpha-glucosidase inhibitors appears to improve Postprandial and OGTT Glucose.
ConsensusScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
- 1
Glucose iAUC (OGTT)
EvidenceScore™ Limited | EvidenceScore™ 35.5 | neutral | ConsensusScore™ Unclear | 1 study
Why this answer: This answer is based on a small number of supporting studies and should be interpreted cautiously.
Limitations
- Only a small number of supporting studies are available.
- Consistency cannot yet be determined.
- Population details are unavailable.
Does Alpha-glucosidase inhibitors improve insulin resistance?
Limited Evidence
Current evidence does not show a clear benefit of Alpha-glucosidase inhibitors for Insulin Resistance.
ConsensusScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
- 1
Fasting insulin levels
EvidenceScore™ Limited | EvidenceScore™ 35.5 | neutral | ConsensusScore™ Unclear | 1 study
- 2
Insulin resistance
EvidenceScore™ Limited | EvidenceScore™ 35.5 | neutral | ConsensusScore™ 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.
Does Alpha-glucosidase inhibitors improve fasting glucose?
Limited Evidence
Current evidence does not show a clear benefit of Alpha-glucosidase inhibitors for Fasting Glucose.
ConsensusScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
- 1
Fasting blood sugar (FBS)
EvidenceScore™ Limited | EvidenceScore™ 35.5 | neutral | ConsensusScore™ 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.
Does Alpha-glucosidase inhibitors improve HbA1c?
Limited Evidence
Current evidence does not show a clear benefit of Alpha-glucosidase inhibitors for HbA1c.
ConsensusScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
- 1
HbA1c
EvidenceScore™ Limited | EvidenceScore™ 35.5 | neutral | ConsensusScore™ 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.
Next steps
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