What does this video actually claim?
Giselle Machado is promoting a Biowel serum containing GHK-Cu (copper peptide) that she claims gives her more hydrated skin with a glow. She says the peptide helps with skin regeneration, improves firmness, and softens fine lines.
The post reads like a classic influencer product placement. She teases a "secret" and mentions people asking about her skin, then conveniently reveals the product with affiliate links in her stories.
Her specific claims about GHK-Cu's benefits aren't completely made up, but they're presented without any nuance about what the research actually shows.
Does GHK-Cu actually work for skin?
GHK-Cu does have some legitimate research behind it, though not as much as Machado's enthusiasm suggests. The tripeptide was first identified by Loren Pickart in the 1970s and has been studied for wound healing and skin repair.
A 2012 study by Pickart and Margolina in the Journal of Aging Research and Clinical Practice found that GHK-Cu increased collagen synthesis in cultured human fibroblasts by 70%. Another small study by Arul et al. (2005) in the Journal of Trauma showed faster wound healing with copper peptides compared to controls.
But here's the catch: most research uses concentrations and delivery methods you won't find in over-the-counter serums. The studies showing dramatic results often involve injections or professional treatments, not the cosmetic peptides in Instagram-promoted serums.
What's missing from this influencer pitch?
Machado doesn't mention that cosmetic peptides face a major hurdle: getting through your skin barrier. Peptides are relatively large molecules that don't penetrate skin easily when applied topically.
She also skips the timeline reality. The collagen studies showing GHK-Cu benefits measured results over weeks to months, not the immediate glow she's describing. Any instant skin improvement you see is likely from the serum's moisturizing ingredients, not peptide activity.
The concentration matters too. Effective GHK-Cu concentrations in research range from 0.5% to 2%, but most cosmetic products don't disclose their peptide concentrations. Without knowing the actual amount, you can't evaluate if you're getting an effective dose.
Should you trust influencer peptide recommendations?
Probably not without doing your homework first. The peptide skincare market is flooded with products making big claims based on minimal evidence.
GHK-Cu isn't snake oil, but it's not the miracle ingredient Machado makes it sound like either. The research is promising but limited, and there's a big difference between laboratory results and what happens when you apply a serum at home.
If you want to try peptide skincare, look for products that disclose their concentrations and have third-party testing. Better yet, talk to a dermatologist about proven anti-aging treatments like retinoids or vitamin C, which have decades of research behind them.
The bottom line on this peptide hype
Machado's claims about GHK-Cu aren't entirely wrong, but they're oversimplified and overly optimistic. The peptide does have some research support, but not nearly enough to justify the breathless promotion.
The bigger red flag is the presentation: the secret reveal, the mysterious glow, the convenient affiliate links. This is marketing first, science second.
If you're interested in peptide skincare, approach it as an experimental addition to proven basics like sunscreen and moisturizer, not as the revolutionary solution influencers want you to believe it is.