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Until at least the first of these steps is taken, the injectable/systemic GHK-Cu story remains a mechanistically compelling but clinically unproven hypothesis

In-vitro studies using primary neuronal cells or immortalized neuronal cell lines (like PC12 or SH-SY5Y) have been used to examine the peptide's influence on neurite outgrowth, cell survival, and the expression of nerve growth factors

These properties may also improve the appearance of post-procedure skin texture and enhance skin recovery upon topical application to affected areas after complete healing

JAMA Internal Medicine, 180 (3), 458-459

My protocol during this period: Retatrutide: 2mg weekly subcutaneous injection (ramped to 4mg by week 10) GHK-Cu: 1mg daily subcutaneous, rotated injection sites Cycle length: 12 weeks on, 4 weeks off Training: 4 days resistance training per week, 8,000 to 10,000 steps daily Protein intake: 130g daily minimum I sourced both from Red Fox Peptides