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Use a standard U-100 insulin syringe for injecting
They also help form red blood cells
Most notably, it is needed for the body to form red blood cells and DNA
Try relaxing your muscle more during future injections, as tense muscles tend to hurt more when injected
For example, 5 mg mixed with 2 mL makes 250 mcg about 10 units on a U-100 syringe
Deficiency in vitamin B12 can result in symptoms such as fatigue, weakness, tingling sensations, and difficulty concentrating
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