Last updated July 2, 2026
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.
Quick read
The essential study design details in one scan.
EvidenceScore™
Moderate
Study type
RCTs
Follow-up
Medium-Term (3–12 mo)
Risk of bias
Some Concerns
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Plain-language summary
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.
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.
Limited sample size may affect generalizability Short duration of the study may not capture long-term effects Lack of diverse population representation
Published in
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
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
Understand where this research contributes within the broader evidence network.
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
Primary intervention
Intervention and outcome relationships this study adds to the evidence network.
Editorial context
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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.
5
Related topics
10
Evidence pairs
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Primary evidence
Evidence relationship
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Evidence relationship
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Core evidence
The primary outcomes reported in this study.
Standard anti-diabetic drugs only → Fasting blood sugar (FBS)
Standard anti-diabetic drugs only → Fasting blood sugar (FBS)
Standard anti-diabetic drugs only → Fasting insulin levels
Standard anti-diabetic drugs only → Fasting insulin levels
Standard anti-diabetic drugs only → Glucose iAUC (OGTT)
Standard anti-diabetic drugs only → Glucose iAUC (OGTT)
Standard anti-diabetic drugs only → Insulin resistance
Standard anti-diabetic drugs only → Insulin resistance
Vitamin D supplementation → Fasting blood sugar (FBS)
Vitamin D supplementation → Fasting blood sugar (FBS)
Vitamin D supplementation → Fasting insulin levels
Vitamin D supplementation → Fasting insulin levels
Vitamin D supplementation → Glucose iAUC (OGTT)
Vitamin D supplementation → Glucose iAUC (OGTT)
Vitamin D supplementation → Insulin resistance
Vitamin D supplementation → Insulin resistance
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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.
This study contributes to the evidence on the following intervention-outcome relationships.
Supplements
Curated evidence collections and hubs this study is part of.
All studies measuring HbA1c
Measures HbA1c as a key outcome.
All studies on Vitamin D supplementation
Contributes to Vitamin D supplementation evidence base.
All studies measuring Insulin Resistance
Measures Insulin Resistance as a key outcome.
Latest published studies
Published within the last 2 years.
Jump to pre-filtered views in Evidence Explorer.
5 results
4 results
5 results
5 results
4 results
Generated from the study's connected evidence using Evidence Intelligence™.
Alpha-glucosidase inhibitors may improve Postprandial and OGTT Glucose.
ConsistencyScore™: Results are generally consistent across studies.
Ranked evidence signals
Glucose iAUC (OGTT)
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on 3 supporting studies with generally consistent results and a positive effect signal.
Limitations
Alpha-glucosidase inhibitors may improve Insulin Resistance.
ConsistencyScore™: Results are mixed and should be interpreted cautiously.
Ranked evidence signals
Fasting insulin levels
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study
Insulin resistance
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is cautious because the available studies report mixed findings.
Limitations
Current evidence does not show a clear benefit of Alpha-glucosidase inhibitors for HbA1c.
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
HbA1c
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
Current evidence does not show a clear benefit of Alpha-glucosidase inhibitors for Fasting Glucose.
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
Fasting blood sugar (FBS)
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
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