# Carnosine Sleep Randomized Trial: What the Evidence Says
Canonical: https://www.migaku.app/guides/carnosine-sleep-randomized-trial-evidence-review
Category: evidence-review
Summary: Carnosine Sleep Randomized Trial has 2 source documents in the current Migaku evidence database. The strongest available sources in this first pass are random
Last reviewed: 2026-08-09
Reviewed by: Migaku Evidence Review
# Carnosine Sleep Randomized Trial: What the Evidence Says

## Quick Answer

Carnosine Sleep Randomized Trial has 2 source documents in the current Migaku evidence database. The strongest available sources in this first pass are randomized trial, 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: 2 randomized trial.
- 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 |
| --- | --- | ---: | --- | --- |
| Effects of a single dose of L-histidine on mental fatigue and vigor in participants with high fatigue levels: a randomized controlled trial | randomized trial | 2 | 2026-04-15 | 10.1038/s41598-026-48060-x |
| The Effect of Carnosine Supplementation on Depressive Symptoms and Health‐Related Quality of Life in Individuals With Prediabetes and Well‐Controlled Type 2 Diabetes: A Randomized Controlled Trial | randomized trial | 2 | 2026-02-25 | 10.1002/fsn3.71514 |

## What The Sources Report

- It manifests itself as subjective symptoms (e.g., increased mental fatigue, lack of vigor, decreased motivation, and decreased attention), and mental fatigue can lead to poor performance in cognitive tasks and induce sleep disorders. [Shimomasuda Masatsugu (2026); evidence level 2]
- The results showed that a single oral ingestion of L-histidine increased extracellular histamine concentrations around the prefrontal cortex (PFC) and basal forebrain, resulting in an increase in the number of c-Fos-positive cells around these areas, followed by attenuation of memory impairment. [Shimomasuda Masatsugu (2026); evidence level 2]
- Individuals with T2DM have a higher risk of mental health disorders (Arias et al. ; Deshpande et al. ; Ducat et al. ), with the prevalence of depression reported to be two-fold higher in those with T2DM compared with the general population (Roy and Lloyd ). [Kabthymer Robel Hussen (2026); evidence level 2]
- Similarly, the prevalence of depression is moderately increased in individuals with prediabetes compared with their normo-glycaemic counterparts (Chen et al. ). [Kabthymer Robel Hussen (2026); evidence level 2]

## 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

There is trial evidence in the current set, but population and intervention details still matter. For carnosine sleep randomized trial, the next editorial step is to add more targeted sources and separate strong findings from early or indirect evidence.

## 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

- Shimomasuda Masatsugu (2026). Effects of a single dose of L-histidine on mental fatigue and vigor in participants with high fatigue levels: a randomized controlled trial. DOI: 10.1038/s41598-026-48060-x. PMCID: PMC13243660. PMID: 41986440. License: CC BY 4.0. https://pmc.ncbi.nlm.nih.gov/articles/PMC13243660/
- Kabthymer Robel Hussen (2026). The Effect of Carnosine Supplementation on Depressive Symptoms and Health‐Related Quality of Life in Individuals With Prediabetes and Well‐Controlled Type 2 Diabetes: A Randomized Controlled Trial. DOI: 10.1002/fsn3.71514. PMCID: PMC12935567. PMID: 41767833. License: CC BY 4.0. https://pmc.ncbi.nlm.nih.gov/articles/PMC12935567/

## 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.