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More recent studies expanded this work
If you take B12 supplements, multivitamins, or receive B12 injections, the high result is almost always a reflection of your intake and is clinically insignificant
Taken as capsules or powder, stable in gastric juice (survives digestion), best theoretically for gut-brain axis effects
You should get B12 shots weekly to monthly for maintenance and IV infusions monthly to quarterly for broader wellness support, though frequency depends on deficiency severity, health goals, and your providers recommendation
People who are pregnant, breastfeeding, managing certain chronic conditions, or taking specific medications should always talk with a medical professional first
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