b12 injection wearing off What Not to Do After a — Essential Tips Feeling worse after B12 Injection:

Vitamin B12 (cobalamin) is essential for energy production, red blood cell formation, neurological function, and DNA synthesis

My energy level increased and I feel great

The lack of intrinsic factor is most commonly due to autoimmune gastritis, which causes an autoimmune attack on the parietal cells that create it in the stomach

Risk of fluid overload Potassium imbalance 2

Seek medical advice if you experience: New or worsening vision problems Severe or progressive weakness Loss of coordination or balance Confusion or cognitive changes Seizures These symptoms could indicate underlying conditions requiring investigation