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Administering a B12 Injection Safely and Professionally Hi Dr. Tony here! If you give yourself injectionstestosterone, estrogen, insulin, peptides, or B12these are 3 of my favorite tips to make them almost painless. Tip 1: Insert the needle quickly, then Should I be concerned? I did my T shot last night and when I woke up the injection site was red and there was a firm bump where the testosterone was injected. Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief What happens if you inject B12 wrong? CoLaz
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