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how to give b12 injections Shots at Home: How, Where & Often Inject Yourself Vitamin B12 Inejctions at Skin2Soul
Description
Mice were maintained in standard laboratory conditions of a temperature-controlled (22 1C) room with a 12:12 h light-dark cycle (7:0019:00)

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Summers, A

You might be an ideal candidate if you're following a vegan or vegetarian lifestyle (plants don't naturally contain B12), or if you've been diagnosed with pernicious anemia (where your body attacks the cells needed to absorb B12)

Many B12-rich foods are from animal products like beef, chicken, milk, and cheese
For most people, yes especially when guided by a healthcare provider
