b12 injection instructions when Instruction Guide for Intramuscular (IM) Self-injection of Methylcobalamin 1mg/5mg Best Vitamin B12 Injection Site:
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This is quite a theory, enough so to examine what she means, whether there is anything to it, and how this may pertain to allergic reactions to Vitamin B 12

Maternal Vitamin B12 Status During Pregnancy and Its Association With Outcomes of Pregnancy and Health of the Offspring: A Systematic Review and Implications for Policy in India. Frontiers in Endocrinology vol
Gramer, Gwendolyn et al

Pyridoxine HCl Injection is stable in air but should not be left open to air unnecessarily

Squeeze the center of the muscle
