『Crepey Skin, Sagging Skin & the Science of GHK-Cu』のカバーアート

Crepey Skin, Sagging Skin & the Science of GHK-Cu

Crepey Skin, Sagging Skin & the Science of GHK-Cu

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If you’re fit, strong and taking care of yourself — but suddenly feel like your skin didn’t get the memo — this episode is for you. Crepey skin. Sagging skin. Wrinkly skin. Skin that suddenly seems too big for your body. It is one of the biggest frustrations I hear from women and men in midlife. You can be in fantastic shape, yet suddenly you’re thinking twice about sleeveless tops because of your upper arms. You’re noticing the skin above your knees. Your chest looks different. The backs of your hands look older. And sometimes it genuinely feels as though it happened overnight. So in this episode of Midlife Mayhem, we’re going deep into what is actually happening to our skin as we move through our 40s, 50s, 60s and beyond — and, more importantly, what the science tells us we can potentially do about it. And yes, this is a science-heavy episode. Because over the past year I have gone rather spectacularly down the rabbit hole of regenerative skincare while developing my Blue Theory™ range — particularly my Regenerative Face Serum and the new GHK-Cu Body Booster. Why does our skin suddenly change so much? Collagen makes up a huge proportion of the structure of our skin, but we begin losing it surprisingly early in adulthood. That decline becomes particularly noticeable around perimenopause and menopause as estrogen falls. At the same time, we're losing some of the substances responsible for keeping skin hydrated and plump, including hyaluronic acid. Elastin becomes damaged. And the biological signals telling our skin to repair and rebuild itself become quieter. That last part became incredibly important to me. When I started formulating Blue Theory, I wasn't interested in creating something that simply sat on top of the skin and made it look shiny for a few hours. I wanted to understand the ingredients involved in the skin's own repair and regenerative processes. And that search led me to GHK-Cu. So what on earth is GHK-Cu? Don't let the name put you off. GHK is simply a tiny peptide made from three amino acids: glycine, histidine and lysine. Cu is copper. Put them together and you have the copper peptide GHK-Cu. The story behind it is fascinating. GHK was identified in human plasma in the 1970s, and researchers became interested in its relationship with cellular activity and tissue repair. What really sent me down the rabbit hole was discovering that our natural levels of GHK decline dramatically as we age — at the same time that our skin becomes less capable of repairing and regenerating itself. Suddenly, GHK-Cu wasn't simply another trendy skincare ingredient to me. I wanted to know everything about it. GHK-Cu, collagen and mature skin In the podcast I walk you through some of the research that originally stopped me in my tracks. We talk about studies examining topical GHK-Cu and its relationship with collagen production, skin firmness, laxity, texture, pigmentation, density and thickness. And this is an important distinction I make in the episode: the research that initially got me excited about GHK-Cu was topical research. People frequently ask me about injectable GHK-Cu. I've used injectable GHK-Cu myself, but that's not what this particular conversation is about. For skin, I became fascinated by what researchers were seeing when GHK-Cu was applied topically. Then I found the GHK-Cu + hyaluronic acid research This was another big moment for me. A 2023 study examined GHK-Cu combined with lower-molecular-weight hyaluronic acid and reported a dramatic increase in type IV collagen synthesis in human dermal fibroblast cultures. Type IV collagen is particularly interesting because it is involved in the junction between the epidermis and dermis — an area that becomes weaker as skin ages. But I make an important distinction in the podcast. That dramatic number came from laboratory research — not a clinical trial showing someone's skin suddenly producing 25 times more collagen. Cell-culture results don't translate one-for-one to what happens when we put a serum on our bodies. Nevertheless, the documented interaction between the ingredients fascinated me and became one of the reasons I wanted GHK-Cu and hyaluronic acid together in my formulations. And that's how the Body Booster was born I had wanted to create a GHK-Cu product specifically for the body for quite some time. The obvious answer seemed to be a body lotion. So I made one. Then a cream. Then a body butter. And I didn't love any of them. Not because they were necessarily bad — but because we're all incredibly particular about body lotions. Some people want something rich and buttery. Others hate that feeling and want something incredibly light. I use different products myself depending on the season. Then I had the obvious-in-hindsight idea: Why am I trying to reinvent everybody's favorite body lotion? Why not create the concentrated skincare component and let you add a few drops to the body lotion or cream you already ...
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