Peptides for Cosmetic
Reviewed by Marcus Hopkin, PhD
Director of Research and Development, Volta Peptides
Written by Volta Peptides Editorial Team · Reviewed September 15, 2026
This guide provides an in-depth examination of two peptides that have been investigated for their cosmetic applications, ranked by the strength of supporting evidence. The review encompasses their mechanisms of action, safety profiles, and current clinical status, allowing researchers to better understand the potential implications of these compounds in cosmetic formulations.
Overview
2 research peptides are currently studied for cosmetic. This guide ranks them by evidence strength and covers their mechanisms, safety profiles, and current clinical status.
Acetyl Tetrapeptide-3 — Manufacturer-Sponsored Studies
Evidence Rating: D
Category: Hair Growth / Cosmetic
Acetyl Tetrapeptide-3 is a biomimetic peptide frequently incorporated into hair care products, particularly as a key ingredient in formulations like Capixyl, which combines this peptide with biochanin A derived from red clover. Research sponsored by manufacturers indicates that topical application over a 12-week period may lead to a 17% increase in hair diameter and a notable 46% reduction in hair loss. However, it is important to note that these studies often lack independent verification, raising questions about the robustness of the findings. As a cosmetic ingredient rather than a pharmaceutical drug, Acetyl Tetrapeptide-3 is readily available in various hair serums and topical treatments. The limited scope of research and reliance on manufacturer-sponsored studies necessitate cautious interpretation of these results, emphasizing the need for further independent clinical trials to substantiate efficacy claims.
Myristoyl Pentapeptide-17 — No Regulatory Activity
Evidence Rating: F
Category: Cosmetic Peptide
Myristoyl pentapeptide-17 is a lipopeptide primarily utilized in cosmetic formulations aimed at promoting eyelash and eyebrow growth. The proposed mechanism of action involves the stimulation of keratin gene expression within hair follicle cells, facilitated by the myristoyl (C14 fatty acid) chain, which is believed to enhance penetration into the hair follicles. Despite its widespread use in cosmetic products, the clinical evidence supporting its effectiveness remains exceedingly limited, predominantly consisting of studies conducted by manufacturers that focus on eyelash growth. The lack of independent research and regulatory oversight highlights significant gaps in the available data, underscoring the necessity for more rigorous investigations to validate the claimed benefits of myristoyl pentapeptide-17 in cosmetic applications.
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Quality Documentation
Review batch documentation before making research purchasing decisions. Volta pairs product education with COA literacy so researchers can evaluate purity, identity, lot details, and testing context.
Product cards on this page link to current catalog entries and available quality documentation.
Peptide Tools
Key research references
- Best Peptides for Anti-Aging | Research Guide
- Best Peptides for Metabolic Health | Research Guide
- Best Peptides for Weight Management | Research Guide
- Best Peptides for Body Composition | Research Guide
- Best Peptides for Reproductive Health | Research Guide
- Best Peptides for Anti-Aging & Longevity | Research Guide
- Best Peptides for Weight Loss | Research Guide
- Best Peptides for Cognitive Enhancement | Research Guide
- Retatrutide Dosing Guide | Protocols & Reconstitution
- Wound Healing Peptides | Research Compounds
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About the reviewer
Director of Research and Development, Volta Peptides
Marcus Hopkin, PhD, is Director of Research and Development at Volta Peptides. He has more than 12 years of analytical chemistry experience, including direct laboratory work in peptide synthesis, characterization, purity testing and stability assessment. His doctoral research at the University of Michigan examined novel peptide structures in the human proteome and their potential significance for therapeutic-peptide research. Before joining Volta Peptides he held research and development roles at Amgen and Eli Lilly and Company, and served as a lecturer at the University of Michigan.
Marcus reviewed this article for scientific and analytical accuracy on September 15, 2026. He did not write it. Technical review is internal review and is not peer review, independent third-party review or medical review.
Disclosure. Marcus Hopkin is an employee of Volta Peptides and serves as its Director of Research and Development. Volta Peptides sells research compounds related to subjects discussed in the content he writes and reviews. His reviews are internal scientific and technical review and must not be described as independent third-party review, peer review or medical review.