b12 injection side effects sore throat Does the Vitamin Shot Have Effects? Why Do I Feel Worse

In 2009, a double-blind randomised-controlled trial (RCT) found significant reductions in duration of outbreaks, the number of ulcers and the level of pain in those on B12, 1000 g per day sublingually (form not reported), regardless of B12 level

For B12, a person may feel energetic on a high dose despite no underlying deficiency, or they may experience side effects like headaches without any abnormality in kidney or B12 panels

Note the date and approximate duration each time the vial spends time outside the fridge beyond routine injections

Overall, these results suggest that vitamin B12 might exert its function through methionine in the one-carbon cycle

Molecules 28 (3), 1486