vitamin b12 injection interval Best Sites Vitamin B12: Understanding Deficiency and

Special attention is required in vegetarians, vegans and athletes with a low (but within the normal range) vitamin B 12 concentration (200400 pg/mL)

Behere, Rishikesh V et al

Maybe youve tried vitamin B12 sublingual or other oral forms

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8,9 Table 1 Risk Factors for Vitamin B12 Deficiency A multicenter randomized controlled trial of 390 patients with diabetes mellitus showed that those taking 850 mg of metformin three times per day had an increased risk of vitamin B 12 deficiency (number needed to harm = 14 per 4.3 years) and low vitamin B 12 levels (number needed to harm = 9 per 4.3 years) vs