why do gastic bypass patients need b12 injections The prevalence of deficiency after Roux-en-Y gastric surgery is about 20%. Serum B12 levels <400 pg/mL are considered suboptimal because 5-10% of w neurologic symptoms related to B12 insufficiency Size:50 ml EOFYSALE25 Cobal B12 Injection 1mg/1ml
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