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Catecholamines (adrenaline and noradrenaline) change blood flow to reproductive organs, influencing uterine lining and testicular temperature

Human use constitutes uncontrolled self-experimentation without safety data

There were significant changes on the total testosterone, ratio of LH/FSH, serum insulin, IGF-1 and IGFBP-1 levels in the 100 mg/kg Cinnamon powder-treated PCOS mice compared to DHEA-induced PCOS mice, indicating that Cinnamomum zeylanicum acts via polyphenol-mediated insulin sensitization and AMPK activation [119]

If you are comparing broader injection-route categories, see our list of injectable peptides