{"title":"Best Sellers","description":"\u0026lt;p\u0026gt;Cupra's best-selling GHK-Cu copper peptide skincare — the formulas customers return to most. Each product delivers a clinically studied peptide that influences over 4,000 human genes involved in collagen synthesis, barrier repair, and skin regeneration.\u0026lt;\/p\u0026gt;","products":[{"product_id":"ghk-cu-balm-stick","title":"Koppā GHK-Cu Face + Body Peptide Balm Stick","description":"\u003cp\u003eCrow's feet, the 11s, lip lines, forehead creases, neck lines — even hands, chest and body. The GHK-Cu Balm Stick delivers GHK-Cu and a nine-peptide complex, including Argireline and Matrixyl, exactly where you apply it. The concentrated anhydrous balm melts on contact, forming a long-wearing layer that keeps the peptides in place.\u003c\/p\u003e\u003cp\u003eAt 20g, this GHK-Cu skin stick holds more than twice the product found in many peptide balm sticks, making it practical for daily use beyond the face. One GHK-Cu stick for targeted treatment — from fine lines around the eyes to the neck, décolletage, hands and anywhere skin needs extra support.\u003c\/p\u003e\u003cp\u003eUnlike compact wrinkle sticks designed for small facial areas, Koppā's 20g Face + Body Balm Stick is generously sized for daily use on the face, neck, chest, hands and anywhere skin benefits from concentrated peptide care.\u003c\/p\u003e\u003cp\u003eFace. Body. Morning. Night.\u003c\/p\u003e","brand":"Koppā","offers":[{"title":"20g","offer_id":46861568606396,"sku":"CUP-PREC-001","price":36.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/8691\/5772\/files\/GHK_STICK_FINAL_TRANSPARENT.png?v=1784096845"},{"product_id":"ghk-cu-serum","title":"Koppā GHK-Cu 2% Serum","description":"\u003cp\u003eA lightweight, fast-absorbing serum delivering a clinical 2% concentration of GHK-Cu copper peptides across the full face. Formulated for maximum bioavailability at 340 Daltons — well below the 500 Da skin penetration threshold — so the peptide actually reaches the fibroblast layer where collagen synthesis happens.\u003c\/p\u003e\u003cp\u003eGHK-Cu was first identified in 1973 when researchers discovered that older tissue exposed to young plasma began behaving like young tissue again. The active factor was GHK-Cu. A landmark 2012 study found it influences the expression of over 4,000 human genes — upregulating repair, collagen synthesis, and antioxidant defense while downregulating inflammation.\u003c\/p\u003e\u003cp\u003eAt 2% concentration, this serum delivers a meaningful clinical dose with every application. This is not a trace amount listed for label appeal — it is a formulation designed to work.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e2% GHK-Cu concentration — clinical-strength dosing\u003c\/li\u003e\n\u003cli\u003e340 Dalton molecular weight — penetrates the stratum corneum\u003c\/li\u003e\n\u003cli\u003eUpregulates collagen I, III, and antioxidant defense (SOD)\u003c\/li\u003e\n\u003cli\u003eLightweight, non-sticky, absorbs in seconds\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFull Ingredients:\u003c\/strong\u003e Aqua (Water), Glycyl-L-Histidyl-L-Lysine:Cu²⁺ Complex (GHK-Cu) 2%, Glycerin, Sodium Hyaluronate, Panthenol, Niacinamide, Allantoin, Carbomer, Sodium Hydroxide. pH 5.0–5.5. Free from: synthetic fragrance, parabens, silicones, PEGs.\u003c\/p\u003e","brand":"Koppā","offers":[{"title":"30ml","offer_id":46861568639164,"sku":"CUP-SIG-001","price":64.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/8691\/5772\/files\/koppa-ghk-cu-2-percent-serum-dropper-bottle.png?v=1783900738"}],"url":"https:\/\/koppabeauty.com\/collections\/best-sellers.oembed","provider":"Koppā","version":"1.0","type":"link"}