Research Summary
Analyzed using Evidence Intelligence™

Intensive lifestyle intervention improves vitamin D levels in type 2 diabetes

Last updated September 3, 2026

Key finding

25(OH)D had an ILI-related increase of 2.04 ng/mL (95% CI: 0.20, 3.88).

This study investigated the effects of an intensive lifestyle intervention on calcium metabolism hormones in adults with type 2 diabetes, revealing an increase in 25-hydroxyvitamin D and a decrease in parathyroid hormone.

Quick read

Study at a glance

The essential study design details in one scan.

EvidenceScore™

Moderate

Study type

RCTs

Follow-up

Long-Term (1–5 y)

Risk of bias

Some Concerns

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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 study investigated the effects of an intensive lifestyle intervention on calcium metabolism hormones in adults with type 2 diabetes, revealing an increase in 25-hydroxyvitamin D and a decrease in parathyroid hormone.

Clinical relevance

These findings are significant because they suggest that lifestyle changes can positively influence vitamin D metabolism and parathyroid hormone levels, potentially improving health outcomes for individuals with type 2 diabetes. This could lead to better management of diabetes-related complications and enhance bone health.

Keep in mind

Effectiveness of the intervention remains unclear due to limited data No significant treatment effect observed for vitamin D-binding protein Sample size and demographic details not specified

Published in

Journal Reference

Publication details and source links for this paper.

Jiahuan HH, Chigolum PO, Jianqiao M, et al. Intensive Lifestyle Intervention and Hormones Regulating Calcium Metabolism in Adults with Type 2 Diabetes. Journal of the Endocrine Society. 2026;10(5):bvag089. doi:10.1210/jendso/bvag089

Main Effects

25-hydroxyvitamin D increased by 2.04 ng/mL (95% CI: 0.20, 3.88)

Parathyroid hormone decreased by 6.75 pg/mL (95% CI: -11.4, 2.13)

No significant change in vitamin D-binding protein was observed

Evidence network

How this study fits

Understand where this research contributes within the broader evidence network.

Evidence Context

This study contributes evidence to Lifestyle intervention for prediabetes and Change in plasma levels of parathyroid hormone (PTH), Serum 25-hydroxyvitamin D, Vitamin D-binding protein.

Primary intervention

Lifestyle intervention for prediabetes

Primary outcomes

  • Change in plasma levels of parathyroid hormone (PTH)
  • Serum 25-hydroxyvitamin D
  • Vitamin D-binding protein

Evidence relationships

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

3
Evidence pairs
3
Relationships
0
Evidence topics
contributes_evidence

Editorial context

Why this study matters

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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.

Moderate contributionModerate confidenceNetwork score: 54

0

Related topics

3

Evidence pairs

0

Related studies

Why it is useful

  • Contributes to 3 evidence relationships
  • Includes primary outcome data
  • Linked to 0 direct semantic evidence topics

Core evidence

Study findings

The primary outcomes reported in this study.

Change in plasma levels of parathyroid hormone (PTH)

Lifestyle intervention for prediabetes → Change in plasma levels of parathyroid hormone (PTH)

Lifestyle intervention for prediabetes → Change in plasma levels of parathyroid hormone (PTH)

Evidence Intelligence™
EvidenceScore™
Emerging
Score 59 · Based on 1 study
ImpactScore™
100
Very Positive
ConsistencyScore™
unclear
Not enough independent studies
Supporting studies: Based on 1 study
Add to Evidence Tracker

Serum 25-hydroxyvitamin D

Lifestyle intervention for prediabetes → Serum 25-hydroxyvitamin D

Lifestyle intervention for prediabetes → Serum 25-hydroxyvitamin D

Evidence Intelligence™
EvidenceScore™
Emerging
Score 59 · Based on 1 study
ImpactScore™
100
Very Positive
ConsistencyScore™
unclear
Not enough independent studies
Supporting studies: Based on 1 study
Add to Evidence Tracker

Vitamin D-binding protein

Lifestyle intervention for prediabetes → Vitamin D-binding protein

Lifestyle intervention for prediabetes → Vitamin D-binding protein

Evidence Intelligence™
EvidenceScore™
Emerging
Score 59 · Based on 1 study
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

  • 25-hydroxyvitamin D levels increased by 2.04 ng/mL
  • Parathyroid hormone levels decreased by 6.75 pg/mL
  • No significant effect on vitamin D-binding protein was found
who this applies

Who this applies to

  • Adults diagnosed with type 2 diabetes
  • Individuals seeking lifestyle interventions for health improvement
keep in mind

Keep in Mind

  • Results may not be generalizable to all populations with diabetes
  • Further research is needed to confirm long-term effects
  • Study design limitations may affect the interpretation of effectiveness
between the lines

Between the Lines

  • Effectiveness of the intervention remains unclear due to limited data
  • No significant treatment effect observed for vitamin D-binding protein
  • Sample size and demographic details not specified

Evidence Library

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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 Lifestyle intervention for prediabetes and Change in plasma levels of parathyroid hormone (PTH), Lifestyle intervention for prediabetes and Adipokine and Angiogenic Markers.

Related evidence relationships

Explore in Evidence Explorer

This 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.

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Questions answered by this study

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

Does Lifestyle intervention for prediabetes improve change in plasma levels of parathyroid hormone (PTH)?

Emerging Evidence

Lifestyle intervention for prediabetes appears to improve change in plasma levels of parathyroid hormone (PTH).

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

Ranked evidence signals

  1. 1

    Change in plasma levels of parathyroid hormone (PTH)

    EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | ConsistencyScore™ Unclear | 1 study

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

Limitations

  • Only one supporting study is available.
1 supporting study

Does Lifestyle intervention for prediabetes improve serum 25-hydroxyvitamin d?

Emerging Evidence

Lifestyle intervention for prediabetes appears to improve serum 25-hydroxyvitamin d.

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

Ranked evidence signals

  1. 1

    Serum 25-hydroxyvitamin D

    EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | ConsistencyScore™ Unclear | 1 study

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

Limitations

  • Only one supporting study is available.
1 supporting study

Does Lifestyle intervention for prediabetes improve vitamin d-binding protein?

Emerging Evidence

Current evidence does not show a clear benefit of Lifestyle intervention for prediabetes for vitamin d-binding protein.

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

Ranked evidence signals

  1. 1

    Vitamin D-binding protein

    EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study

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

Limitations

  • Only one supporting study is available.
1 supporting study
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