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R.BiagiC
Whereas occludin and junction adhesion molecule have a regulatory role, claudins are transmembrane proteins mainly responsible for the intestinal barrier function
Cosmetic-grade GHK-Cu and research-grade GHK-Cu are regulated separately and are not interchangeable
From there, it goes straight to the liver via the portal vein for whats called "first-pass metabolism." The liver is the body's detoxification center, and it's ruthless with foreign compounds, often breaking them down before they ever reach the rest of the body
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