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Nature 426 , 442446 (2003)

The Compound Classes Most Studied in Tendon Research Tendon healing is limited by three biological constraints: low resident cell density (tenocytes proliferate slowly), poor vascularization (tendons have limited baseline blood supply), and structured extracellular matrix requirements (collagen must reorganize into the correct fibril architecture for functional recovery)

In neuronal cell cultures, GHK-Cu demonstrates remarkable neuroprotective effects, reducing oxidative damage by 55% and enhancing cell survival under stress conditions by 40% compared to control administrations

FDA on the 503A bulk substances Category 2 list in 2023 , removing it from compounding pharmacy eligibility on the grounds that human safety, immunogenicity, and PK data were insufficient