# Selenium Hair Nails Randomized Trial: What the Evidence Says
Canonical: https://www.migaku.app/guides/selenium-hair-nails-randomized-trial-evidence-review
Category: evidence-review
Summary: Selenium Hair Nails Randomized Trial has 2 source documents in the current Migaku evidence database. The strongest available sources in this first pass are sy
Last reviewed: 2026-07-26
Reviewed by: Migaku Evidence Review
# Selenium Hair Nails Randomized Trial: What the Evidence Says

## Quick Answer

Selenium Hair Nails Randomized Trial has 2 source documents in the current Migaku evidence database. The strongest available sources in this first pass are systematic review, 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 systematic review, 1 observational study.
- 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 |
| --- | --- | ---: | --- | --- |
| The Role of Selenium During Gestation in the Development of Fetal Congenital Anomalies: A Systematic Review | systematic review | 1 | 2026-02-01 | 10.3390/nu18030479 |
| Oral Fish Collagen Peptide Complex Enhances Skin Rejuvenation and Systemic Health Biomarkers: A 90 Day Prospective Observational Study | observational study | 3 | 2026-04-09 | 10.1111/jocd.70841 |

## What The Sources Report

- In the environment, Se can be found in soils and waters, both in elemental form and in inorganic compounds, as selenides, selenates, and selenites. [Stachika Nikolina (2026); evidence level 1]
- Selenium deficiency has been associated with cardiovascular, endocrine, immune, neurological, and musculoskeletal disorders. [Stachika Nikolina (2026); evidence level 1]
- Accumulating evidence has demonstrated the beneficial effects of oral collagen supplementation in promoting skin rejuvenation. [Huang Jingjing (2026); evidence level 3]
- This research seeks to provide robust evidence for synergistic nutritional strategies in combating skin aging and promoting optimal dermal health. [Huang Jingjing (2026); evidence level 3]

## 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 at least one systematic-review style source in the current set, so it deserves more weight than single-study evidence. For selenium hair nails 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

- Stachika Nikolina (2026). The Role of Selenium During Gestation in the Development of Fetal Congenital Anomalies: A Systematic Review. DOI: 10.3390/nu18030479. PMCID: PMC12900013. PMID: 41683301. License: CC BY 4.0. https://pmc.ncbi.nlm.nih.gov/articles/PMC12900013/
- Huang Jingjing (2026). Oral Fish Collagen Peptide Complex Enhances Skin Rejuvenation and Systemic Health Biomarkers: A 90 Day Prospective Observational Study. DOI: 10.1111/jocd.70841. PMCID: PMC13062880. PMID: 41952536. License: CC BY 4.0. https://pmc.ncbi.nlm.nih.gov/articles/PMC13062880/

## 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.