What did @joaopinheironutri actually say?
Honestly? Not much that's usable. The transcript for this video is largely incoherent, a string of disconnected phrases about presidents, bands, blankets, and something described as "twoolphdes RIPES" and a sun that is red. There is a reference to GHK-Cu in the hashtags and a mention of "klow" as a separate peptide, and the caption promises viewers will learn to "differentiate these peptides." But the actual spoken content, as captured, does not deliver a coherent comparison of any peptides. What we can work with is the implied premise: that GHK-Cu and something called KLow are distinct compounds worth understanding separately.
Does the science back this up?
GHK-Cu, yes. KLow, that's where things get murky fast. GHK-Cu (glycyl-L-histidyl-L-lysine copper complex) has a real and reasonably well-documented research history going back to Pickart's work in the 1970s. There is actual peer-reviewed science here. "KLow" does not appear in indexed biomedical literature under that name, which raises immediate questions about what is being sold or promoted under that label.
GHK-Cu has been studied for its effects on skin remodeling, wound healing, and antioxidant signaling. A 2018 review by Pickart, Vasquez-Soltero, and Margolina in Biomolecules summarized evidence that GHK-Cu activates genes involved in tissue repair and suppresses inflammatory cytokines. A 2015 study by Pickart and Margolina in Organogenesis found it could increase collagen synthesis in cultured fibroblasts. These are cell-culture and animal studies, not large human RCTs, so the leap to clinical skin-care claims is still a leap.
"KLow" as a named peptide therapeutic does not appear in PubMed, ClinicalTrials.gov, or any pharmacopeial database I can locate. If this is a branded compounded formulation, a proprietary blend, or a regional trade name, viewers deserve to know that before comparing it to a compound with decades of basic research behind it.
What did they get wrong (or right)?
The premise of differentiating GHK-Cu from another peptide is potentially useful content. GHK-Cu is often confused with generic copper peptides, and explaining its specific copper-binding tripeptide structure versus other formulations would serve an audience interested in skin longevity and peptide therapy. Credit for the intent.
However, the execution, at least based on what's captured in transcript, fails to land any factual claims. Phrases like "the sun is red and there are all granular sign1983 that goes above the clock" are not a scientific comparison of peptide mechanisms. If this is a translation artifact, the video still needs to be evaluated on what viewers actually receive, and what's documented here is unintelligible.
The hashtag "medicinaintegrativa" (integrative medicine) alongside "glow" and "klow" suggests this may be positioned as a cosmetic or wellness peptide protocol. That framing matters legally and clinically. Neither GHK-Cu nor any unnamed "KLow" compound is approved by the FDA as a drug for treating skin conditions or any disease. Presenting peptide comparisons in a medical context without that context is a compliance concern.
What should you actually know?
GHK-Cu is one of the more studied cosmetic peptides in dermatology research, but "more studied" is relative. The evidence base is mostly in vitro and animal models. A 2019 review by Errante et al. in Current Protein and Peptide Science noted that while GHK-Cu shows promising bioactivity in lab settings, human clinical trials are limited in number and size. It is not a treatment for any disease.
Before comparing two peptides, you need to know what both of them actually are. If "KLow" is a compound your clinic or formulator created, or a regional brand name for a known peptide, say so explicitly. Audiences in this space are increasingly sophisticated and will ask. If they don't, they should.
Compounded peptides, whether GHK-Cu, BPC-157, or anything labeled KLow, are not equivalent to any FDA-approved drug product. Regulation of compounded peptides in Brazil and elsewhere is evolving, and anyone receiving these compounds should be doing so under licensed medical supervision with documented informed consent, not because an Instagram video made it sound like a straightforward skin-glow protocol.
The bottom line on this specific video
The content promised a useful comparison and delivered an incoherent transcript. That alone is reason for caution. When a creator with 226,000 views on a peptide comparison video cannot be clearly understood or quoted, the audience is being asked to trust a vibe rather than a fact. GHK-Cu has real science worth discussing. The comparison peptide in this video, whatever KLow is, does not yet have a verifiable research record. Until it does, any claim that it performs comparably to or better than established compounds is not supported.