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Someone you follow on peptide stuff just contradicted his own podcast partner. Yesterday, one partner — Hunter Williams — said on a podcast class that a peptide called GHK-Cu does not help with loose skin. Today his partner Jay Campbell emailed subscribers saying the opposite: that GHK-Cu is one of the most underrated peptides for tightening loose skin. So the news is basically a public disagreement between two people who usually present a united front. GHK-Cu is a short protein fragment (a peptide) that’s naturally found in the body at low levels and can be attached to copper (that’s the “Cu” part). People talk about it because lab studies show it can affect skin cells, blood vessel growth, and collagen production — all factors involved in skin health. That doesn’t mean it’s a magic skin-tightener; it’s a molecule that influences processes that could, in theory, improve skin quality. What the evidence actually shows is mixed and limited. Most supportive data come from cell studies, small animal experiments, or tiny human trials like topical creams with modest effects. There’s little large, rigorous clinical evidence proving GHK-Cu reliably reduces loose, sagging skin after weight loss or aging. In this specific story, we’re not seeing new peer-reviewed research: we’re seeing two influencers interpreting existing, limited studies differently and promoting opposite takes in public channels. That’s a big reason for the confusion. Why it matters is practical: many readers are curious about non-surgical ways to improve loose skin after weight loss or aging. If you follow these influencers, their conflicting messages can influence people’s choices and spending on products, creams, or injections that may have small or uncertain benefits. For someone considering treatments, this debate highlights that the science isn’t settled and that marketing claims should be viewed skeptically. There are several important caveats and risks. Topical or injected GHK-Cu products vary widely in quality and dose, and they’re not regulated like medicines. Potential side effects can include local irritation or allergic reactions; injections carry infection and dosing risks. People with certain conditions or on medications should be cautious, and anyone considering peptides should consult a licensed clinician. Also, anecdote and marketing often outpace hard evidence — neither a podcast nor an email replaces large, controlled clinical trials. Bottom line: two partners publicly contradicted each other about GHK-Cu for loose skin, reflecting limited and mixed evidence — it’s an interesting molecule, but not a proven solution for sagging skin.
Source: r/Peptides