Research Summary
Analyzed using Evidence Intelligence™

BLG improves insulin response compared to WPI in T2DM patients

Last updated September 1, 2026

Key finding

BLG increased concentrations of insulin with 10% compared with WPI after the OGTT (all p < 0.05).

This study compared the insulinotropic effects of β-lactoglobulin and whey protein isolate in patients with type 2 diabetes, finding significant differences in insulin and glucagon levels.

Quick read

Study at a glance

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

What this paper says

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

Study focus

This study compared the insulinotropic effects of β-lactoglobulin and whey protein isolate in patients with type 2 diabetes, finding significant differences in insulin and glucagon levels.

Clinical relevance

Understanding the insulinotropic effects of different dietary proteins can help tailor nutritional interventions for patients with type 2 diabetes. The findings suggest that β-lactoglobulin may be a more effective protein source for managing insulin and glucagon levels, potentially leading to better glycemic control and improved diabetes management strategies.

Keep in mind

Limited sample size may affect generalizability. Short duration of the study may not capture long-term effects. No assessment of participants' dietary habits outside the intervention.

Published in

Journal Reference

Publication details and source links for this paper.

Stine BS, Maike M, Adam H, et al. The Insulinotropic Effect of β-Lactoglobulin Compared to Whey Protein Isolate in Patients with Type 2 Diabetes. Nutrients. 2021;13(2):308. doi:10.3390/nu13020308

Main Effects

BLG increased insulin concentrations by 10% compared to WPI after OGTT (p < 0.05).

BLG increased glucagon concentrations by 20% compared to WPI after OGTT (p < 0.05).

Both BLG and WPI reduced interstitial fluid glucose concentrations by 2 mM compared to tap-water (p < 0.05).

Evidence network

How this study fits

Understand where this research contributes within the broader evidence network.

Evidence Context

This study contributes evidence to 25 g β-lactoglobulin (BLG), whey protein 20g and Glucagon, Glucose, Indices of 24-hour glycemic variability, and 2 more.

Primary intervention

25 g β-lactoglobulin (BLG)

Primary outcomes

  • Glucagon
  • Glucose
  • Indices of 24-hour glycemic variability

Evidence relationships

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

7
Evidence pairs
7
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: 50

0

Related topics

7

Evidence pairs

0

Related studies

Why it is useful

  • Contributes to 7 evidence relationships
  • Includes primary outcome data
  • Linked to 0 direct semantic evidence topics

Core evidence

Study findings

The primary outcomes reported in this study.

Glucagon

25 g β-lactoglobulin (BLG) → Glucagon

25 g β-lactoglobulin (BLG) → Glucagon

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

Glucose

25 g β-lactoglobulin (BLG) → Glucose

25 g β-lactoglobulin (BLG) → Glucose

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

Indices of 24-hour glycemic variability

25 g β-lactoglobulin (BLG) → Indices of 24-hour glycemic variability

25 g β-lactoglobulin (BLG) → Indices of 24-hour glycemic variability

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

Insulin

25 g β-lactoglobulin (BLG) → Insulin

25 g β-lactoglobulin (BLG) → Insulin

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

Interstitial fluid glucose concentration reduction

25 g β-lactoglobulin (BLG) → Interstitial fluid glucose concentration reduction

25 g β-lactoglobulin (BLG) → Interstitial fluid glucose concentration reduction

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

Indices of 24-hour glycemic variability

whey protein 20g → Indices of 24-hour glycemic variability

whey protein 20g → Indices of 24-hour glycemic variability

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

Interstitial fluid glucose concentration reduction

whey protein 20g → Interstitial fluid glucose concentration reduction

whey protein 20g → Interstitial fluid glucose concentration reduction

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

Evidence Library

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evidence suggest

Evidence Suggest

  • BLG increased insulin levels by 10% compared to WPI (p < 0.05).
  • BLG increased glucagon levels by 20% compared to WPI (p < 0.05).
  • Both proteins reduced glycemic variability by 10-15% compared to tap-water (p < 0.05).
who this applies

Who this applies to

  • Adults aged 30-65 with type 2 diabetes.
  • Individuals looking for dietary interventions to manage diabetes.
keep in mind

Keep in Mind

  • Results are based on a specific population and may not apply to all diabetes patients.
  • Further research is needed to confirm long-term effects of β-lactoglobulin.
  • The study focused only on acute responses post-OGTT.
between the lines

Between the Lines

  • Limited sample size may affect generalizability.
  • Short duration of the study may not capture long-term effects.
  • No assessment of participants' dietary habits outside the intervention.

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 whey protein 20g and Glucose, whey protein 20g and Indices of 24-hour glycemic variability.

Related evidence relationships

Explore in Evidence Explorer

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

Diet and Nutrition
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
View evidence

Questions answered by this study

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

Does 25 g β-lactoglobulin (BLG) improve glucagon?

Emerging Evidence

25 g β-lactoglobulin (BLG) appears to improve glucagon.

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

Ranked evidence signals

  1. 1

    Glucagon

    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 25 g β-lactoglobulin (BLG) improve glucose?

Emerging Evidence

25 g β-lactoglobulin (BLG) appears to improve glucose.

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

Ranked evidence signals

  1. 1

    Glucose

    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 25 g β-lactoglobulin (BLG) improve indices of 24-hour glycemic variability?

Emerging Evidence

25 g β-lactoglobulin (BLG) appears to improve indices of 24-hour glycemic variability.

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

Ranked evidence signals

  1. 1

    Indices of 24-hour glycemic variability

    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 25 g β-lactoglobulin (BLG) improve insulin?

Emerging Evidence

25 g β-lactoglobulin (BLG) appears to improve insulin.

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

Ranked evidence signals

  1. 1

    Insulin

    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
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