If you choose nasal spray despite these limitations, use approximately 1.0-1.5 mg per application (equivalent to 0.5 mg injected)
Reference: Nutritional priorities to support GLP-1 therapy for obesity: a joint Advisory from the American College of Lifestyle Medicine, the American Society for Nutrition, the Obesity Medicine Association, and The Obesity Society Mozaffarian, Dariush et al
In a nested casecontrol study involving prostate cancer patients and matched controls, both low (19 nmol/L) and high (80 nmol/L) serum levels were associated with a higher risk of prostate cancer, while average concentrations were linked to the lowest risk (71)
That rationale is plausible from the science, but it is only a rationale: robust trials showing that copper peptides improve transplant outcomes are lacking, so this should be treated as unproven rather than established
Bleecker*, Deborah Meyers, Wendy Moore, Stephen Peters, Rodolfo M