why do i feel dizzy after b12 injection Common & Rare Side Effects of Vitamin Injections Why Do I Feel Worse

Continuous use without breaks can reduce receptor sensitivity and potentially cause copper dysregulation

They are ideal for relaxing muscles after days of activity

Heres my game plan: Test for intrinsic factor antibodies if my doctor offers this Try high-dose sublingual B12 (5000mcg daily) for 8 weeks as a test If my B12 stays below 400 pg/mL, go straight to injections Calculate the cost difference to justify the investment The 10% Rule If youre absorbing less than 10% of your oral B12 (you can estimate this by comparing your supplement dose to your blood response), weekly shots often cost less than daily high-dose pills

Converting mcg to mL for Accurate Administration To give the right dose, you need to change the mcg amount to mL

Without enough B12, this process slows downleading to fatigue, sluggish metabolism, and difficulty losing weight