# MediSpa Peptides — Skin & Aesthetics Research Peptides > MediSpa Peptides is a reference digest for Skin & Aesthetics research peptides — GLOW blend and GHK-Cu — summarized from peer-reviewed literature. A digest, not a vendor or clinic. A careful reading desk for the published science on GLOW (research blend) and GHK-Cu — what each was actually studied for, in which species, and how strong the evidence really is. ## The short version MediSpa Peptides is a reading desk, not a store. It collects what the published research literature actually says about two compounds that keep appearing in conversations about **skin remodeling, hair, and aesthetic repair**: the GLOW research blend (a combination of GHK-Cu, BPC-157 and TB-500) and GHK-Cu as a standalone peptide. A *peptide* is a short chain of amino acids — the same building blocks that make proteins, only far smaller. Each of these has been studied because it appears to nudge the skin's repair machinery: rebuilding the collagen and elastin scaffold, growing new blood vessels, helping cells migrate into a wound, or slowing the decline in matrix proteins that tracks with age. This desk does one job: it tells you, in plain language and with citations, what each compound was tested on, in which species, and how far that evidence actually reaches. For both, honest caveats belong alongside the findings. Most of the mechanistic work is in animals or cell culture. GHK-Cu has the strongest human track record, but that record is largely topical and small-scale. GLOW as a blend has never been tested in a controlled study at all. None of the compounds here is an approved medicine. We do not sell anything, give medical advice, or list a human dose. ## What are research peptides? Proteins in your body — collagen in skin, a signaling enzyme, a growth factor — are long chains of amino acids folded into functional shapes. A *peptide* is a much shorter chain of the same amino acids, sometimes only three or four links long. Because they are small and specific, peptides can act like keys that fit particular locks (receptors) on the surface of cells, switching certain processes on or off. A *research peptide* is one that has been synthesized and studied in the laboratory — in cell cultures, in animals, occasionally in early human pilots — but has **not** been approved by a regulator as a medicine. Suppliers sell these compounds for laboratory research use only, and that framing matters: it means human dosing, long-term safety, and real-world effectiveness in people are usually unestablished. When this site reports a number, it reports it exactly as the study did — for example, *studied at 10 micrograms per kilogram in rats* — never as a recommendation. ## How these two fit into skin research The two compounds on this desk approach the skin from different angles — one is a single copper-binding tripeptide, the other a three-peptide combination — and the research behind them is correspondingly different in character. - [**GHK-Cu**](/ghk-cu) is the foundation. It is a tiny copper-carrying tripeptide that signals dermal fibroblasts to synthesize collagen, elastin and the proteoglycans that give skin structure [4][5]. Of the two, it has the most human evidence — a handful of small topical clinical trials and one controlled hair-loss study — though a delivery limitation (the molecule crosses intact skin poorly on its own) runs through its story [8]. - [**GLOW (research blend)**](/glow) is the combination. It pairs GHK-Cu with BPC-157 (a pro-angiogenic pentadecapeptide) and TB-500 (the actin-binding fragment of thymosin beta-4), on the rationale that a matrix-building signal, a vascular signal, and a cell-migration signal together cover more of the repair process than any one alone [1]. The important caveat: that combination rationale has never been tested as a unit in a controlled study, and the blend inherits the regulatory and safety profile of its most restricted constituent [2]. Read each compound on its own page, or [compare these peptides](/compare) side by side. ## A note on how this desk reads the literature MediSpa Peptides is a cross-referenced literature digest. Each page summarizes the peer-reviewed studies for that compound, cites them by number, and links to a single shared [references list](/references) that aggregates every source. Where the evidence is thin, single-lab, preclinical, or derived from a different compound than the one being marketed, this desk says so plainly. That candor about limits is not a footnote — it is central to what a rigorous reading of this field requires. We describe research findings and the cited cautions that come with them; we do not recommend, prescribe, or sell. --- A literature digest for skin-peptide research: citations weighed at face value, evidence limits stated plainly, nothing sold.