Under these conditions, lyophilized peptide can typically remain stable for months often the majority of a vials total shelf life is spent in this unmixed state, well before reconstitution volume or concentration ever becomes a factor
Label vial with reconstitution date and refrigerate at 28 C (35.646.4 F) , protected from light
Without insurance, Zepbound costs an average of $1,559 for 4, 0.5 mL of 2.5 mg/0.5 mL pens (typically a one-month supply)
We mention this not to claim GHK-Cu is "better" than retinol - it isn't a fair comparison given the difference in research depth - but because it suggests the ingredient is doing something real at the structural level when formulated and applied thoughtfully
If a PA is required, your insurance plan will ask your doctor to submit detailed information on your diet and exercise history, your past weight loss attempts, weight loss medications you previously tried, and any unique challenges that you face that make a GLP-1 medically necessary