i have b12 injections but still tired Common & Rare Side Effects of Vitamin Feeling Tired and Run-Down? B12
Description
Any negative side effects come from the very small risk of bleeding or infection after the shot

5 In some cases, sublingual B12 supplementation may be more effective than oral administration
Heres what to watch for: Increased Energy and Alertness Many patients feel less sluggish within 13 days

This is the single most common misclassification

Solution: Begin with a low dose and gradually increase under guidance