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April 2026 Category 2 Update On April 15, 2026, the FDA confirmed removal of injectable GHK-Cu from Category 2 because the original nominations were withdrawn
Chronic GI conditions often require 4-12 weeks of consistent oral use
GHK-Cu functions as a biological signaling molecule that binds copper(II) ions with high affinity, facilitating copper delivery to enzymatic processes essential for tissue maintenance
No lethal dose has been established in animal studies, even at dosages many orders of magnitude higher than those used in therapeutic research
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