JL: Data curation, Methodology, Writing review and editing
Apply that to the two vial sizes on the market: Caveat on this arithmetic: many commercial GHK-Cu powders are supplied as an acetate salt (copper tripeptide-1 xHOAc), which lowers the copper fraction below 15.7% by an amount that depends on the acetate stoichiometry and residual water
Specialized endometriosis clinics demonstrate improved cost-effectiveness despite higher per-visit costs

Additional Caution May Be Appropriate If You: Have highly sensitive or reactive skin Are prone to allergies or cosmetic skin irritation Have rosacea-prone skin Are currently utilizing strong exfoliating acids or active skincare ingredients Have a compromised, damaged, or irritated skin barrier Avoid Cosmetic Application To: Broken skin Open wounds Severely irritated areas Areas experiencing active irritation or heightened sensitivity Cosmetic Formulation Considerations Lower introductory concentrations are commonly preferred when beginning new cosmetic peptide formulations Patch testing is recommended before larger cosmetic application areas Gradual introduction into cosmetic skincare routines is generally preferred Formulation compatibility with other active skincare ingredients should be considered If uncertain whether a cosmetic peptide formulation is suitable for a specific skincare routine, consultation with a qualified skincare professional may be considered prior to cosmetic use

Also, the nasal spray can be designed for unit dosing or discharge up to several hundred metered sprays of the formulation [24]
Do not re-treat cattle for 8 weeks after last treatment