Research Summary
Analyzed using Evidence Intelligence™

Sitagliptin with Metformin Improves Metabolic Health

Key finding

FBS decreased significantly in the sitagliptin + metformin group compared to metformin alone (P = 0.030).

This study evaluated the effects of sitagliptin plus metformin therapy on metabolic profiles in patients with type 2 diabetes and NAFLD, finding significant improvements in various metabolic markers.

Evidence strength

Moderate confidence

Study type

RCTs

Follow-up

Medium-Term (3–12 mo)

Some Concerns bias
Last updated July 6, 2026

Quick 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

Sitagliptin + Metformin, Metformin

Study type

RCTs

Follow-up

Medium-Term (3–12 mo)

Primary outcome

Fasting Blood Sugar (FBS)

Comparator

Metformin

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 evaluated the effects of sitagliptin plus metformin therapy on metabolic profiles in patients with type 2 diabetes and NAFLD, finding significant improvements in various metabolic markers.

Clinical relevance

The findings highlight the potential of combining sitagliptin with metformin to improve metabolic health in patients suffering from both type 2 diabetes and NAFLD. Given the rising prevalence of these conditions, effective treatment strategies are crucial for reducing long-term complications and improving patient outcomes.

Keep in mind

The study's sample size may limit the generalizability of the findings. The duration of the intervention may not reflect long-term effects. Potential confounding factors were not fully controlled.

Published in

Journal Reference

Publication details and source links for this paper.

Habib Y, Majid R, Niki K, Majid M, Narges ST. Sitagliptin Plus Metformin Therapy Improves Metabolic Profile in Patients with Type 2 Diabetes and NAFLD. Current Therapeutic Research, Clinical and Experimental. 2024;101:100764. doi:10.1016/j.curtheres.2024.100764

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Main Effects

Fasting blood sugar decreased by 18 mg/dL in the sitagliptin + metformin group (P = 0.030).

Total cholesterol decreased by 58 mg/dL in the sitagliptin + metformin group (P = 0.017).

Triglycerides decreased by 93 mg/dL in the sitagliptin + metformin group (P = 0.008).

Evidence network

How this study fits

Understand where this research contributes within the broader evidence network.

Evidence Context

This study contributes evidence to Dipeptidyl peptidase-4 inhibitors, Metformin and Alanine Aminotransferase (ALT), Fasting blood sugar (FBS), Glycemia risk index, and 3 more.

Primary intervention

Dipeptidyl peptidase-4 inhibitors

Primary outcomes

  • Alanine Aminotransferase (ALT)
  • Fasting blood sugar (FBS)
  • Glycemia risk index

Evidence relationships

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

12
Evidence pairs
12
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

12

Evidence pairs

262

Related studies

High relevance in at least one topic

Why it is useful

  • Contributes to 12 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

Core evidence

Study findings

The primary outcomes reported in this study.

StrongDecrease

Alanine Aminotransferase (ALT)

Dipeptidyl peptidase-4 inhibitors → Alanine Aminotransferase (ALT)

Dipeptidyl peptidase-4 inhibitors → Alanine Aminotransferase (ALT)

Evidence profile

StrongDecreaseMetabolic Health
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StrongDecrease

Fasting blood sugar (FBS)

Dipeptidyl peptidase-4 inhibitors → Fasting blood sugar (FBS)

Dipeptidyl peptidase-4 inhibitors → Fasting blood sugar (FBS)

Evidence profile

StrongDecreaseGlycemic Control
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StrongDecrease

Glycemia risk index

Dipeptidyl peptidase-4 inhibitors → Glycemia risk index

Dipeptidyl peptidase-4 inhibitors → Glycemia risk index

Evidence profile

StrongDecreaseGlycemic Control
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StrongDecrease

Serum vitamin D3 levels (Placebo)

Dipeptidyl peptidase-4 inhibitors → Serum vitamin D3 levels (Placebo)

Dipeptidyl peptidase-4 inhibitors → Serum vitamin D3 levels (Placebo)

Evidence profile

StrongDecreaseMetabolic Health
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StrongDecrease

Total cholesterol

Dipeptidyl peptidase-4 inhibitors → Total cholesterol

Dipeptidyl peptidase-4 inhibitors → Total cholesterol

Evidence profile

StrongDecreaseMetabolic Health
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StrongDecrease

Triglycerides

Dipeptidyl peptidase-4 inhibitors → Triglycerides

Dipeptidyl peptidase-4 inhibitors → Triglycerides

Evidence profile

StrongDecreaseMetabolic Health
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NoneNo Change

Alanine Aminotransferase (ALT)

Metformin → Alanine Aminotransferase (ALT)

Metformin → Alanine Aminotransferase (ALT)

Evidence profile

NoneNo ChangeMetabolic Health
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NoneNo Change

Fasting blood sugar (FBS)

Metformin → Fasting blood sugar (FBS)

Metformin → Fasting blood sugar (FBS)

Evidence profile

NoneNo ChangeGlycemic Control
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NoneNo Change

Glycemia risk index

Metformin → Glycemia risk index

Metformin → Glycemia risk index

Evidence profile

NoneNo ChangeGlycemic Control
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NoneNo Change

Serum vitamin D3 levels (Placebo)

Metformin → Serum vitamin D3 levels (Placebo)

Metformin → Serum vitamin D3 levels (Placebo)

Evidence profile

NoneNo ChangeMetabolic Health
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NoneNo Change

Total cholesterol

Metformin → Total cholesterol

Metformin → Total cholesterol

Evidence profile

NoneNo ChangeMetabolic Health
Unlock full evidence details
NoneNo Change

Triglycerides

Metformin → Triglycerides

Metformin → Triglycerides

Evidence profile

NoneNo ChangeMetabolic Health
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evidence suggest

Evidence Suggest

  • Sitagliptin + metformin significantly reduced triglyceride-glucose index by 0.67 vs 0.21 (P = 0.017).
  • Vitamin D3 levels decreased significantly in the sitagliptin + metformin group (P = 0.001).
  • SGPT decreased by 8 IU/L in the sitagliptin + metformin group (P = 0.018).
who this applies

Who this applies to

  • Adults diagnosed with type 2 diabetes.
  • Patients with non-alcoholic fatty liver disease (NAFLD).
keep in mind

Keep in Mind

  • Results may not apply to populations outside the study sample.
  • The study did not assess long-term outcomes beyond the intervention period.
  • Further research is needed to explore the effects in diverse populations.
between the lines

Between the Lines

  • The study's sample size may limit the generalizability of the findings.
  • The duration of the intervention may not reflect long-term effects.
  • Potential confounding factors were not fully controlled.

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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 DPP-4 Inhibitors and Adipokine and Angiogenic Markers, DPP-4 Inhibitors and Fasting Glucose.

Related evidence relationships

Explore in Evidence Archive

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 DPP-4 Inhibitors improve adipokine and angiogenic markers?

Emerging Evidence

DPP-4 Inhibitors appears to improve Adipokine and Angiogenic Markers.

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

Ranked evidence signals

  1. 1

    Alanine Aminotransferase (ALT)

    EvidenceScore™ Emerging | EvidenceScore™ 51.7 | strong positive | ConsensusScore™ Unclear | 1 study

  2. 2

    Total cholesterol

    EvidenceScore™ Emerging | EvidenceScore™ 51.7 | strong positive | ConsensusScore™ Unclear | 1 study

  3. 3

    Triglycerides

    EvidenceScore™ Emerging | EvidenceScore™ 51.7 | strong positive | 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.
1 supporting studyUpdated: Jul 2026

Does DPP-4 Inhibitors improve cgm time in range?

Emerging Evidence

DPP-4 Inhibitors appears to improve CGM Time in Range.

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

Ranked evidence signals

  1. 1

    Glycemia risk index

    EvidenceScore™ Emerging | EvidenceScore™ 51.7 | strong positive | 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.
1 supporting studyUpdated: Jul 2026

Does Metformin Therapies improve fasting glucose?

Emerging Evidence

Metformin Therapies appears to improve Fasting Glucose.

ConsensusScore™: Results are consistent across studies.

Ranked evidence signals

  1. 1

    Fasting blood sugar (FBS)

    EvidenceScore™ Limited | EvidenceScore™ 34.2 | neutral | ConsensusScore™ Unclear | 1 study

Why this answer: This answer is based on 3 supporting studies with consistent results and a positive effect signal.

Limitations

  • Population details are unavailable.
3 supporting studiesUpdated: Jul 2026

Does DPP-4 Inhibitors improve fasting glucose?

Emerging Evidence

DPP-4 Inhibitors appears to improve Fasting Glucose.

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

Ranked evidence signals

  1. 1

    Fasting blood sugar (FBS)

    EvidenceScore™ Emerging | EvidenceScore™ 51.7 | strong positive | 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.
2 supporting studiesUpdated: Jul 2026
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