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Most clinicians recommend B12 injections every 1 to 4 weeks for deficiency treatment and once a month for maintenance after deficiency is corrected
| Agent | FDA Approval | Mean Weight Loss (RCT) | Route | |---|---|---|---| | Semaglutide 2.4 mg (Wegovy) | Yes (2021) | 14.9% at 68 weeks (STEP-1, N=1,961) [9] | Subcutaneous weekly | | Tirzepatide 15 mg (Zepbound) | Yes (2023) | 20.9% at 72 weeks (SURMOUNT-1, N=2,539) [11] | Subcutaneous weekly | | AOD-9604 1 mg oral | No | ~2.8 kg at 12 weeks (Phase IIb, N=300 approx.) [1] | Oral (not currently compounded) | The weight-loss magnitude from the single Phase IIb AOD-9604 trial is substantially smaller than what STEP-1 (semaglutide) and SURMOUNT-1 (tirzepatide) demonstrated in larger, longer trials
Here's what current research says about both options
Once you ingest vitamin B12, it is processed by acids and enzymes in the stomach and small intestine
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