Injections are also advantageous for individuals who have undergone gastric surgery, as the procedure can: Decrease the number of cells needed to secrete stomach acid and intrinsic factor in the gastrointestinal tract Help bypass absorption challenges Provide adequate levels of the essential vitamin Immediate Increase in Blood Levels B12 injections can raise blood levels of the vitamin within 48 to 72 hours
S., Alothaid, H., Bantun, F., Alhazmi, A., Hakamy, A., Kaabi, Y
Although your doctor may put aside their concerns if/when you explain that you have been supplementing with vitamin B12, it's not outside the realm of reason that your doctor may still want to bring you in to rule out serious illness
A subset of patients (roughly 18%) report that the weekly injection protocol stops working around week 10-12
Fewer sebaceous glands, lower baseline collagen turnover
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