b12 injection in buttocks

What are the benefits of B12 injections before race days?? https://www.prohealth.com/cdn/shop/files/PH703-COA-2026-04-07_Shopify_1000x.jpg?v=1776779157 Prenatal Vitamins Suggested Use: Maintain Energy levels Fat loss A Sulfa Allergy would preclude you from being able to receive this injection Size:5mg

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