What did @ohmysebb actually say?
The creator claims a one-month, 5mg daily GHK-Cu protocol produced visible skin improvements, hair darkening, and fuller beard growth. Their words: "skin is just absolutely insane" and "there's nothing wrong with a GHK-Cu as you can tell." The implicit argument is that GHK-Cu alone drove these cosmetic changes, and that 5mg daily is a reasonable personal dose their body can handle. That is a lot to unpack.
To be clear about what was not said: no disease treatment was claimed, no specific product was promoted by name, and the creator framed this as personal experience rather than a prescription. That framing matters legally and ethically, even if the underlying claims still deserve scrutiny.
Does the science back this up?
Partially, but the leap from bench research to "my beard got darker in one month" is a big one. GHK-Cu is a naturally occurring copper-binding tripeptide with a legitimate body of research behind it, mostly in wound healing, collagen synthesis, and antioxidant pathways. The skin benefits have the strongest support.
Pickart and Margolina (2018, Cosmetics) reviewed decades of GHK-Cu research and found consistent evidence for stimulating collagen, elastin, and glycosaminoglycan production in skin fibroblasts. That is real. Finkley et al. (2007, Journal of Investigative Dermatology) also documented GHK-Cu's role in hair follicle signaling, showing it can enlarge follicles and extend the anagen phase in vitro and in some small human studies. So "hair has gotten darker" is not completely invented, but it is also not a guaranteed outcome backed by large randomized trials.
The problem is almost all of this research used topical GHK-Cu, not systemic daily injections at 5mg. The translation from topical cosmeceutical data to injectable systemic dosing is not established in clinical literature.
What did they get wrong (or right)?
They got the general direction right. GHK-Cu does have plausible mechanisms for skin quality and hair follicle support. Pickart's own lab work going back to the 1970s established GHK as a tissue remodeling signal, and that work has held up reasonably well. Credit where it is due.
What they got wrong is the certainty. "There's nothing wrong with a GHK-Cu" is a sweeping safety claim with no basis in long-term human safety data for injectable systemic use. GHK-Cu has a favorable safety profile in topical cosmeceutical applications, but systemic injectable administration at 5mg daily for 30 days has not been studied in peer-reviewed human trials for safety outcomes. Copper dysregulation is a real biological concern at sufficient doses. The creator's reasoning that "my body can handle it" is not scientific evidence.
The attribution problem is also significant. Skin changes, hair changes, and perceived glow over one month can reflect sleep, diet, hydration, reduced alcohol, or simply noticing yourself more because you are filming yourself. Without a control condition, this is anecdote, not evidence.
What should you actually know?
GHK-Cu is one of the more scientifically plausible peptides in the longevity and skin-optimization space. It is not a fringe compound. Research by Pickart and colleagues spanning multiple decades gives it more foundational support than many peptides currently trending on social media. Topical formulations are widely used in cosmeceuticals and carry a reasonable safety record in that context.
However, injectable GHK-Cu sits in a different regulatory and clinical category. It is not FDA-approved for any indication. Compounded injectable versions exist in gray market and some telehealth contexts, but clinical protocols for systemic dosing are not standardized in published literature. Anyone considering this should be doing so under medical supervision with lab work that includes copper and ceruloplasmin levels, not based on a 30-second TikTok transformation video.
The "5mg every single day" figure the creator mentions should not be treated as a reference dose. Dosing for compounded peptides is individualized, and what works without apparent harm for one person for one month tells you very little about population-level safety over time.
Bottom line on the transformation claim
The before-and-after framing is doing a lot of work here. Skin looking better after a month of anything, including simply paying more attention to yourself, is not proof of mechanism. The creator's results may be real to them. Whether GHK-Cu caused them is genuinely unknown. The science supports plausible mechanisms for skin and hair benefits, the clinical evidence for injectable systemic use in healthy humans is thin, and the safety claim is overconfident. This is a video worth treating as a starting point for research, not a protocol to replicate.