We are gathering input from clinicians on patients experimenting with multi-peptide stacks for recovery, fat loss, or performance. We are interested in practical perspectives on risks, monitoring, and patient counseling. Questions: What concerns do you have about patients using multi-peptide stacks, and what physiologic or pharmacologic risks do you think are most underappreciated? Do you follow a structured approach when counseling patients experimenting with multiple peptides, such as single-agent trials or lab monitoring, and what does that framework look like in your practice? Have you seen cases where peptide stacking led to unexpected adverse effects or diagnostic confusion, and what lessons should clinicians take from those experiences?