b12 injections after weight loss surgery The prevalence of deficiency Roux-en-Y gastric bypass is about 20%. Serum B12 levels <400 pg/mL are considered suboptimal because 5-10% of patients w neurologic symptoms related to B12 insufficiency Size:1000 mcg/ml - 10 ml x 5 should b12 injections be Essential Vitamin B12 for Pets
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