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Anti-doping regulations consider them a form of doping that provides an unfair advantage
If you're consistently observing a lack of desired outcomes in your research, despite proper administration and dosage, it might be time to question the peptide's integrity
References Chang, Chung-Hsun et al
Somatic symptoms of anxiety related to the digestive tract activity include, among others, dry mouth, burning in the esophagus, heartburn, excessive salivation, nausea and vomiting, spastic states of the esophagus, stomach, and intestines, a feeling of discomfort in the abdominal cavity, diarrhea, functional motility disorders, swallowing problems, lack of appetite, and sometimes excessive appetite and obesity
Injectable GHK-Cu does not replace topical application for specific skin targets but operates on a fundamentally different distribution model