# Cacao Flavanol Sleep Quality Meta-analysis: What the Evidence Says
Canonical: https://www.migaku.app/guides/cacao-flavanol-sleep-quality-meta-analysis-evidence-review
Category: evidence-review
Summary: Cacao Flavanol Sleep Quality Meta-analysis has 2 source documents in the current Migaku evidence database. The strongest available sources in this first pass 
Last reviewed: 2026-08-08
Reviewed by: Migaku Evidence Review
# Cacao Flavanol Sleep Quality Meta-analysis: What the Evidence Says

## Quick Answer

Cacao Flavanol Sleep Quality Meta-analysis has 2 source documents in the current Migaku evidence database. The strongest available sources in this first pass are mixed biomedical and public-health sources, so conclusions should be framed as evidence-aware guidance rather than medical advice.

## Key Takeaways

- This page is generated only from sources stored in the Migaku evidence knowledge base.
- Current evidence mix: 1 narrative review, 1 research article.
- Claims should be interpreted with the source type, study design, population, and publication date in mind.
- This article is educational and does not replace care from a qualified clinician.

## Evidence Map

| Source | Evidence type | Level | Date | Identifier |
| --- | --- | ---: | --- | --- |
| Beyond Taste: The Impact of Chocolate on Cardiovascular and Steatotic Liver Disease Risk Factors | narrative review | 3 | 2026-02-14 | 10.3390/nu18040636 |
| Astringent flavanol fires the locus-noradrenergic system, regulating neurobehavior and autonomic nerves | research article | 4 | 2025-01-01 | 10.1016/j.crfs.2025.101195 |

## What The Sources Report

- MetS is a multifactorial condition, with its primary indicators including obesity, hypertension, dyslipidemia, insulin resistance, and hyperglycemia; i.e., a patient who possesses at least 3 of the following parameters is designated with MetS: glucose intolerance, increased levels of triglycerides, augmented waist circumference, low levels of high-density lipoprotein cholesterol (HDL-c), and hypertension. [Tomaru Júlia Mayumi (2026); evidence level 3]
- It is possible to develop a close relationship with MetS, metabolic dysfunction-associated steatotic liver disease (MASLD), and CVD. [Tomaru Júlia Mayumi (2026); evidence level 3]
- Osakabe and Terao, 2018 A B C D E F F G H I J Natsume et al., 2000 A single oral dose of flavanols (FLs) significantly increased mouse spontaneous activity.chemical structure of flavanol; (−)epicatechin (left); procyanidins (right, n ≥ 0).The composition of FLs. [Fujii Yasuyuki (2025); evidence level 4]
- (blue, n = 8) or 25 mg/kg body weight flavanol (red, n = 8).The typical subsequent behavioral trajectories of mice in an arena over 120 min.Distance traveled by each mouse every 10 min.Accumulated travel distance.Total travel distance for 120 min.The FLs-treated group significantly increased the total distance traveled compared with the D.W. [Fujii Yasuyuki (2025); evidence level 4]

## How To Read This Evidence

Evidence level 1 generally reflects systematic reviews or meta-analyses. Level 2 includes randomized trials, guidelines, or public-health guidance. Level 3 usually reflects observational or narrative-review evidence. Level 4 is weaker or early-stage evidence. The level is a sorting aid, not a final quality grade.

## Practical Interpretation

For cacao flavanol sleep quality meta-analysis, the current source set is useful for orientation, but it is not yet broad enough for strong claims. Use cautious language and keep conclusions close to the cited sources.

## Limits Of This First Pass

This is a small-batch MVP article. It uses the first ingested sources for this topic and should be expanded with more targeted searches, license review, and human editorial checks before being treated as a definitive review.

## References

- Tomaru Júlia Mayumi (2026). Beyond Taste: The Impact of Chocolate on Cardiovascular and Steatotic Liver Disease Risk Factors. DOI: 10.3390/nu18040636. PMCID: PMC12943539. PMID: 41754152. License: CC BY 4.0. https://pmc.ncbi.nlm.nih.gov/articles/PMC12943539/
- Fujii Yasuyuki (2025). Astringent flavanol fires the locus-noradrenergic system, regulating neurobehavior and autonomic nerves. DOI: 10.1016/j.crfs.2025.101195. PMCID: PMC12482304. PMID: 41036518. License: CC BY 4.0. https://pmc.ncbi.nlm.nih.gov/articles/PMC12482304/

## Safety Note

Health information can change, and individual risk depends on medical history, medications, pregnancy status, age, and diagnosis. Talk with a qualified clinician before changing treatment, supplement, or medication routines.