does b12 injection hurt

Vitamin Injections | Aesthetic Solutions | Wichita, KS https://www.mountainside-medical.com/cdn/shop/files/Vitamin-B12-Injection-Cyanocobalamin-Shot-1000-mcg-Multiple-Dose-1-mL.jpg?crop=center&height=500&v=1766445479&width=600 Volume:100mL non returnable prescription The recommendation to cycle it: Did not come from research Did not come from pharmacology Did not come from clinical trials It came from gym culture

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