ASMBS B12 Recommendations for People after Bariatric Surgery The American Society for Metabolic and Bariatric Surgery has B12 recommendations for patients after bariatric surgery (Parrott, 2017): 350 to 500 g per day if taken orally
Factors Affecting Effectiveness Timeline Dosage: Higher doses within safe ranges may produce faster results Administration method: Injectable forms typically work faster than oral formulations Injury severity: More severe or chronic conditions take longer to heal Individual metabolism: Personal factors like age, overall health, and lifestyle affect response time Consistency: Regular, consistent dosing produces better and faster results Most users begin noticing subtle improvements within the first week, with progressive enhancement continuing throughout the treatment protocol
Pernicious anaemia, atrophic gastritis, proton pump inhibitors, metformin, and gastrointestinal surgery significantly impair B12 absorption
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the per-vial charts below give the fill for every dose
However, the uncertainty with this is whether it presents a pre-vitamin B12 deficiency or PA, where individuals are not yet symptomatic or are symptomatic but have a serum B12 value within the normal reference ranges
