Last updated September 2, 2026
Key finding
Change in HbA1c was significantly associated with a change in c-PDS (β: -0.04% per point, 95% CI: -0.07, -0.02, p = 0.001).
The Portfolio Diet was studied for its effects on glycemic control in adults with Type 2 diabetes, showing significant improvements in HbA1c levels.
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
The Portfolio Diet was studied for its effects on glycemic control in adults with Type 2 diabetes, showing significant improvements in HbA1c levels.
Improving glycemic control is crucial for managing Type 2 diabetes and reducing the risk of complications. The Portfolio Diet offers a dietary strategy that can help patients achieve better blood sugar levels and improve overall cardiovascular health, making it a valuable option for dietary management in this population.
The study did not assess long-term adherence to the Portfolio Diet. Results may not be generalizable to all populations with Type 2 diabetes. No significant changes in blood pressure were observed, limiting cardiovascular implications.
Published in
Publication details and source links for this paper.
Meaghan EK, Songhee B, Victoria C, et al. The Portfolio Diet Improves Glycemic Control in Adults with Type 2 Diabetes: A Pooled Analysis of Randomized Trials. Nutrients. 2024;16(17):2817. doi:10.3390/nu16172817
HbA1c levels decreased significantly (β: -0.04%, p = 0.001).
Greater adherence to the Portfolio Diet was associated with lower LDL-C.
Lower non-HDL-C levels were observed with greater adherence to the diet.
Total cholesterol and triglycerides also decreased with adherence to the Portfolio Diet.
Evidence network
Understand where this research contributes within the broader evidence network.
This study contributes evidence to Portfolio Diet and Change in non-HDL cholesterol levels, Diastolic blood pressure, HbA1c, and 4 more.
This study contributes evidence to
Primary intervention
Portfolio Diet
Primary outcomes
Evidence topics
Primary intervention
Intervention and outcome relationships this study adds to the evidence network.
Editorial context
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Evidence network role
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2
Related topics
7
Evidence pairs
743
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Evidence topic
Contributes evidence
Evidence topic
Contributes evidence
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Primary evidence
Evidence topic
matched_outcome
Related evidence
Evidence topic
Save evidence
Core evidence
The primary outcomes reported in this study.
Portfolio Diet → Change in non-HDL cholesterol levels
Portfolio Diet → Change in non-HDL cholesterol levels
Portfolio Diet → Diastolic blood pressure
Portfolio Diet → Diastolic blood pressure
Portfolio Diet → Systolic blood pressure
Portfolio Diet → Systolic blood pressure
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Relationships organized using the Dediabetes Evidence Intelligence™ framework.
This study contributes to evidence on Portfolio Diet and Blood Pressure, Portfolio Diet and HbA1c.
This study contributes to the evidence on the following intervention-outcome relationships.
Diet and Nutrition
Diet and Nutrition
Diet and Nutrition
Curated evidence collections and hubs this study is part of.
All studies measuring Adipokine and Angiogenic Markers
Measures Adipokine and Angiogenic Markers as a key outcome.
All studies measuring Blood Pressure
Measures Blood Pressure as a key outcome.
All studies measuring HbA1c
Measures HbA1c as a key outcome.
All studies on Portfolio Diet
Contributes to Portfolio Diet evidence base.
Latest published studies
Published within the last 2 years.
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1 results
1 results
1 results
1 results
1 results
Generated from the study's connected evidence using Evidence Intelligence™.
Portfolio Diet appears to improve change in non-hdl cholesterol levels.
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
Change in non-HDL cholesterol levels
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
Portfolio Diet appears to lower HbA1c.
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
HbA1c
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
Portfolio Diet appears to improve ldl cholesterol.
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
LDL cholesterol
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | 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 Portfolio Diet for diastolic blood pressure.
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
Diastolic blood pressure
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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