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Going beyond 500mcg rarely provides additional benefit and may increase the likelihood of mild side effects like headaches or injection site reactions
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Watch a video with instructions to use an insulin pen
For CMS-1500 paper claims, enter that information in Box 19
Prevalence and Risk Factors for Functional Vitamin B12 Deficiency in Patients with Crohns Disease Revisiting Vitamin B12 Deficiency: A Clinicians Guide For the 21st Century
Lung Cancer In 2017, a study found that men taking B12 supplements appeared to have an increase in lung cancer risk
2009 Mar;104 Suppl 2:S5-9
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