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This includes neurodegenerative diseases such as Alzheimers, as well as mental health conditions like schizophrenia

Along with wide exposure of copper on the skin or mucosa, incidences of contact dermatitis have been reported although not frequently

"Injectable Peptide Therapy: A Primer for Orthopaedic and Sports Medicine Physicians"

The "minimal initial benefit" group (approximately 5-10% of users) reported limited improvements during treatment making discontinuation effects irrelevant, typically explained by inadequate product quality with degraded or low-concentration GHK-Cu, inappropriate application technique reducing absorption, unrealistic expectations exceeding what any topical can achieve, severe underlying pathology requiring medical intervention beyond cosmetic peptides, or individual non-responsiveness to copper peptide treatment for genetic or physiological reasons

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Growth hormone receptor upregulation: Animal studies suggest BPC-157 increases growth hormone receptor expression in tendon tissue, potentially amplifying endogenous GH signaling locally rather than elevating circulating GH