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Subcutaneous Vitamin B12 Injections Wash your hands with soap

Scheduling an IV Infusion For individuals experiencing increased immune stress or recovering from illness, Minnesota IV Hydration offers IV infusions that may include zinc when appropriate

Having surgery in your stomach or intestines wan mess with B12 absorption

This pattern didn't appear in controlled clinical trials where meal timing was standardized, but emerges consistently in free-living research contexts documented on reddit

After an injection, blood levels can remain elevated for several weeks because your body absorbs what it needs and stores the rest in the liver