Research Summary

Analyzed using Evidence Intelligence™

Dietary Guidelines May Need Cultural Adaptation for African Americans

Last updated August 21, 2026

Key finding

Post hoc analyses showed greater HEI improvement in the Mediterranean group compared to the Vegetarian group (p = 0.02).

This study explored the acceptability of various dietary guidelines among African American adults and found significant improvements in diet quality with the Mediterranean diet.

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 explored the acceptability of various dietary guidelines among African American adults and found significant improvements in diet quality with the Mediterranean diet.

Clinical relevance

Understanding dietary preferences and acceptability among African American adults is crucial for developing effective nutrition interventions. The findings suggest that promoting the Mediterranean diet could lead to better dietary adherence and improvements in overall health outcomes, particularly in a population that may face unique dietary challenges.

Keep in mind

The study's sample size may limit the generalizability of the findings. The focus on a specific population may not reflect broader dietary trends. The lack of significant findings for HbA1c and blood pressure limits the clinical implications.

Published in

Journal Reference

Publication details and source links for this paper.

Halide ZA, Nkechi O, Kelli ED, et al. Exploring the Acceptability of Dietary Guidelines Among African American Adults: A Qualitative Study. Nutrients. 2025;17(21):3453. doi:10.3390/nu17213453

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Main Effects

The Mediterranean diet group showed a 3-point increase in diet quality (HEI) compared to the Vegetarian group (p = 0.02).

Participants experienced a weight loss of -2.5 kg on average across all groups (p = 0.97).

No significant differences were found in HbA1c or blood pressure between the dietary groups.

Evidence network

How this study fits

Understand where this research contributes within the broader evidence network.

Evidence Context

This study contributes evidence to Healthy Nordic Diet (HND) and HbA1c, Overall diet quality measured using Nordic Nutrition Recommendation score, Systolic blood pressure, and 1 more.

This study contributes evidence to

Intervention

Healthy Nordic Diet (HND)

Outcome

HbA1c

Evidence topic

Blood Pressure

Primary intervention

Healthy Nordic Diet (HND)

Primary outcomes

HbA1c
Overall diet quality measured using Nordic Nutrition Recommendation score
Systolic blood pressure

Evidence topics

Blood Pressure HbA1c Reduction Weight Loss

Primary intervention

Healthy Nordic Diet (HND)

Primary outcomes

HbA1c Overall diet quality measured using Nordic Nutrition Recommendation score Systolic blood pressure

Evidence relationships

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

Evidence pairs

Relationships

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: 72

Why it is useful

Contributes to 4 evidence relationships
Includes primary outcome data
Linked to 3 direct semantic evidence topics

Topic contributions

Evidence topic

Contributes evidence

Evidence topic

Contributes evidence

Evidence topic

Contributes evidence

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Primary evidence

Evidence topic

Blood Pressure

matched_outcome

Related evidence

Evidence topic

HbA1c Reduction

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Core evidence

Study findings

The primary outcomes reported in this study.

HbA1c

Healthy Nordic Diet (HND) → HbA1c

Evidence Intelligence™

EvidenceScore™: Moderate; Score 69 · Based on 2 studies
ImpactScore™: 75; Positive
ConsistencyScore™: 35; mixed

Based on 2 studies

Add to Evidence Tracker

Overall diet quality measured using Nordic Nutrition Recommendation score

Healthy Nordic Diet (HND) → Overall diet quality measured using Nordic Nutrition Recommendation score

Evidence Intelligence™

EvidenceScore™: Emerging; Score 59 · Based on 1 study
ImpactScore™: 100; Very Positive
ConsistencyScore™: unclear; Not enough independent studies

Based on 1 study

Add to Evidence Tracker

Systolic blood pressure

Healthy Nordic Diet (HND) → Systolic blood pressure

Evidence Intelligence™

EvidenceScore™: Emerging; Score 59 · Based on 1 study
ImpactScore™: 50; Neutral
ConsistencyScore™: unclear; Not enough independent studies

Based on 1 study

Add to Evidence Tracker

Weight change

Healthy Nordic Diet (HND) → Weight change

Evidence Intelligence™

EvidenceScore™: Emerging; Score 59 · Based on 1 study
ImpactScore™: 100; Very Positive
ConsistencyScore™: unclear; Not enough independent studies

Based on 1 study

Add to Evidence Tracker

Evidence Library

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Evidence Suggest

Mediterranean diet led to a 3-point improvement in diet quality (p = 0.02).
Weight loss averaged -2.5 kg across all dietary interventions (p = 0.97).
No significant changes in HbA1c or blood pressure were observed.

Who this applies to

African American adults seeking dietary guidance.
Individuals interested in improving diet quality.
Participants in weight management programs.

Keep in Mind

Results may not be applicable to non-African American populations.
The study did not measure long-term adherence to the diets.
Findings on HbA1c and blood pressure were not statistically significant.

Between the Lines

The study's sample size may limit the generalizability of the findings.
The focus on a specific population may not reflect broader dietary trends.
The lack of significant findings for HbA1c and blood pressure limits the clinical implications.

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 Healthy Nordic Diet (HND) and HbA1c, Healthy Nordic Diet (HND) and Overall diet quality measured using Nordic Nutrition Recommendation score.

Related evidence relationships

Explore in Evidence Explorer

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

Diet and Nutrition

Detailed evidence

Healthy Nordic Diet (HND) → HbA1c

Diet and Nutrition

Evidence Intelligence™

EvidenceScore™: Moderate; Score 69 · Based on 2 studies
ImpactScore™: 75; Positive
ConsistencyScore™: 35; mixed

Based on 2 studies

View evidence

Diet and Nutrition

Detailed evidence

Healthy Nordic Diet (HND) → Overall diet quality measured using Nordic Nutrition Recommendation score

Diet and Nutrition

Evidence Intelligence™

EvidenceScore™: Emerging; Score 59 · Based on 1 study
ImpactScore™: 100; Very Positive
ConsistencyScore™: unclear; Not enough independent studies

Based on 1 study

View evidence

Diet and Nutrition

Detailed evidence

Healthy Nordic Diet (HND) → Blood Pressure

Diet and Nutrition

Evidence Intelligence™

EvidenceScore™: Emerging; Score 59 · Based on 1 study
ImpactScore™: 50; Neutral
ConsistencyScore™: unclear; Not enough independent studies

Based on 1 study

View evidence

Included in these evidence collections

Curated evidence collections and hubs this study is part of.

HbA1c Evidence Hub

All studies measuring HbA1c

2 studies

outcome_hub

Measures HbA1c as a key outcome.

Healthy Nordic Diet (HND) Evidence Hub

All studies on Healthy Nordic Diet (HND)

2 studies

intervention_hub

Contributes to Healthy Nordic Diet (HND) evidence base.

Blood Pressure Evidence Hub

All studies measuring Blood Pressure

1 studies

outcome_hub

Measures Blood Pressure as a key outcome.

Overall diet quality measured using Nordic Nutrition Recommendation score Evidence Hub

All studies measuring Overall diet quality measured using Nordic Nutrition Recommendation score

1 studies

outcome_hub

Measures Overall diet quality measured using Nordic Nutrition Recommendation score as a key outcome.

Recent Diabetes Research

Latest published studies

recency_collection

Published within the last 2 years.

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All studies on Healthy Nordic Diet (HND) and HbA1c

Intervention: Healthy Nordic Diet (HND)Outcome: HbA1c

2 results

All studies on Healthy Nordic Diet (HND) and Overall diet quality measured using Nordic Nutrition Recommendation score

Intervention: Healthy Nordic Diet (HND)Outcome: Overall diet quality measured using Nordic Nutrition Recommendation score

1 results

All studies on Healthy Nordic Diet (HND)

Intervention: Healthy Nordic Diet (HND)

2 results

All studies measuring HbA1c

Outcome: HbA1c

2 results

All studies measuring Overall diet quality measured using Nordic Nutrition Recommendation score

Outcome: Overall diet quality measured using Nordic Nutrition Recommendation score

1 results

Questions answered by this study

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

Does Healthy Nordic Diet (HND) lower HbA1c?

Moderate Evidence

Healthy Nordic Diet (HND) may lower HbA1c.

ConsistencyScore™: Results are mixed and should be interpreted cautiously.

Evidence caveat: The available evidence reports mixed findings.

Ranked evidence signals

1
HbA1c
EvidenceScore™ Moderate | EvidenceScore™ 69.0 | moderate positive | ConsistencyScore™ Mixed | 1 study

Why this answer: This answer is cautious because the available studies report mixed findings.

Limitations

Only one supporting study is available.

View Full Evidence

Does Healthy Nordic Diet (HND) improve overall diet quality measured using nordic nutrition recommendation score?

Emerging Evidence

Healthy Nordic Diet (HND) appears to improve overall diet quality measured using nordic nutrition recommendation score.

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

Ranked evidence signals

1
Overall diet quality measured using Nordic Nutrition Recommendation score
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.

View Full Evidence

Does Healthy Nordic Diet (HND) improve weight change?

Emerging Evidence

Healthy Nordic Diet (HND) appears to improve weight change.

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

Ranked evidence signals

1
Weight change
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.

View Full Evidence

Does Healthy Nordic Diet (HND) improve systolic blood pressure?

Emerging Evidence

Current evidence does not show a clear benefit of Healthy Nordic Diet (HND) for systolic blood pressure.

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

Ranked evidence signals

1
Systolic 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

Only one supporting study is available.

View Full Evidence

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Next steps

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Evidence topics

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Blood Pressure Evidence Hub HbA1c Reduction Evidence Hub Weight Loss Evidence Hub

Explore in Evidence Explorer

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All studies on Healthy Nordic Diet (HND) and HbA1c All studies on Healthy Nordic Diet (HND) and Overall diet quality measured using Nordic Nutrition Recommendation score All studies on Healthy Nordic Diet (HND) and Systolic blood pressure All studies on Healthy Nordic Diet (HND) and Weight change

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