b12 injection sites abdomen Best Vitamin Site: Administering B12 Shots Injecting B12 into fat: 4
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Should I choose the 10 mg or 50 mg vial

Oral administration should be done on an empty stomach, preferably first thing in the morning at least 30 minutes before eating
S., Espindola Netto, J

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This finding has obvious relevance for athletes and anyone engaged in regular resistance training

This is because their bodies change with age