{"product_id":"r21-cortex-rebuilder-1","title":"R21 Cortex Rebuilder","description":"\u003ch3\u003e\u003cstrong\u003eWHAT IT IS\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eWelcome to the next generation of structural hair repair. R21 Cortex Rebuilder is an advanced trichology-grade treatment engineered to strengthen weakened hair from the inside out. Designed for individuals experiencing thinning, breakage, chemical damage, or hair loss related to follicle miniaturization, this formula penetrates deeply into the cortex layer — the very architecture of your strand.\u003c\/p\u003e\n\u003cp\u003ePowered by CortexR21™ Bio-Repair Technology, this luxurious serum deposits essential proteins, amino acids, and cellular-strengthening actives that reinforce internal hair bonds and rebuild the fiber matrix. The result? Resilient, denser-feeling, more youthful-looking hair that behaves like itself again.\u003c\/p\u003e\n\u003cp\u003eIf your strands feel fragile, limp, or chronically stressed, this is your restoration blueprint.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eWHY YOU’LL LOVE IT\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eR21 Cortex Rebuilder doesn’t just coat your hair — it transforms it.\u003c\/p\u003e\n\u003cp\u003eReinforces the cortex to dramatically reduce breakage and mid-shaft snapping\u003c\/p\u003e\n\u003cp\u003eRestores elasticity and tensile strength, improving how hair moves and responds to styling\u003c\/p\u003e\n\u003cp\u003eRebuilds protein gaps caused by heat damage, chemical treatments, and chronic thinning\u003c\/p\u003e\n\u003cp\u003eSupports scalp and follicle health by creating a stronger hair fiber emerging from a healthier root\u003c\/p\u003e\n\u003cp\u003eElevates shine, density, and fullness, promoting a visibly thicker appearance\u003c\/p\u003e\n\u003cp\u003eLuxurious, lightweight texture with immediate and long-term results\u003c\/p\u003e\n\u003cp\u003eTrichologist-formulated with a holistic beauty approach rooted in science\u003c\/p\u003e\n\u003cp\u003eAs Dr. Leola teaches: when you rebuild the cortex, you rebuild confidence.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHOW TO USE\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAfter cleansing, apply a generous amount to damp hair, focusing on mid-lengths to ends.\u003c\/p\u003e\n\u003cp\u003eWork through section by section to ensure full cortex penetration.\u003c\/p\u003e\n\u003cp\u003eLeave on for 10–15 minutes for deep rebuilding.\u003c\/p\u003e\n\u003cp\u003eRinse thoroughly.\u003c\/p\u003e\n\u003cp\u003eUse 2–3 times per week or as recommended in your FollicleFix RX® regimen.\u003c\/p\u003e\n\u003cp\u003eFor severe thinning or breakage, pair with your Cell Decode™ scalp protocol for amplified results.\u003c\/p\u003e","brand":"The Hair Loss Detective New","offers":[{"title":"4 oz","offer_id":63564446368113,"sku":null,"price":49.95,"currency_code":"USD","in_stock":true},{"title":"8 oz","offer_id":63564462358897,"sku":null,"price":69.95,"currency_code":"USD","in_stock":true},{"title":"32 oz","offer_id":63564446400881,"sku":null,"price":139.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/7254\/5137\/files\/R21-Cortex-Rebuilder.webp?v=1778764940","url":"https:\/\/hairlossdetective.com\/products\/r21-cortex-rebuilder-1","provider":"The Hair Loss Detective New","version":"1.0","type":"link"}