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Ongoing Commitment: Optimal results typically require ongoing treatment, though protocols may be adjusted over time based on progress and goals

Vitamin B12 injections are typically prescribed for people who have a deficiency and cannot absorb the vitamin through food or oral supplements

Access this article Similar content being viewed by others Abbreviations BS: Bariatric surgery RYGB: Roux-en-Y gastric bypass SG: Sleeve gastrectomy BPD: Biliopancreatic diversion BPD/DS: Biliopancreatic diversion with duodenal switch BMI: Body mass index References Cox AJ, West NP, Cripps AW

Current evidence suggests that timing is not the primary driver of results