But here are some general guidelines: Severe deficiencies: Daily shots for 1 week, then weekly shots until levels normalize Moderate deficiencies: Weekly shots until the deficiency is corrected Maintenance dosing : Monthly shots to keep B12 levels optimal Its definitely possible to take B12 shots too often
When the liver breaks down RBCs, it releases bilirubin
doi:10.1007/s12178-025-09971-w Villarreal-Espinosa JB, Berreta RS, Pallone L, et al
Users, even enthusiastic ones, have reported side effects including hair loss, blurred vision, rashes, and dizziness
Another RCT found a decrease in homocysteine with 1000 g hydroxo-B12 monthly for 3 months by 2 mol/l, whilst the control group had a 2 mol/l increase, although the difference was not statistically significant
Increasing your vitamin B12 intake can protect against deficiency to prevent these side effects