how do you give b12 injections to Yourself a Injection Best Vitamin B12 Injection Sites:

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Lipotropic injections may cause local injection site reactions including pain, redness, swelling, or bruising

Medical conditions that can also put you at risk for a B12 deficiency include: Pernicious anemia Gastric surgery Crohns disease Celiac disease The natural aging process can also make it harder for you to absorb vitamin B12

breastfeeding Naso B12 Nasal Spray is not recommended during breastfeeding

This article reviews the latest scientific evidence to determine whether a vitamin B12 deficiency may result in weight gain

[2] Hydroxocobalamin is administered via intramuscular or intravenous injection to treat and prevent vitamin B deficiency, particularly in conditions like pernicious anemia where oral B absorption is impaired