b12 injections and lightheadedness Pernicious Anemia: Definition, Symptoms, Causes & Treatment Feeling worse after B12 Injection:
Description
It is widely recommended for individuals with severe insufficiency and malabsorption syndromes

nausea or vomiting

Nutritional guru Alan Gaby, MD, has commented that the only way too much B12 will kill you is if you fill your bathtub with it and drown

Its also possible to have side effects that may affect your overall weight loss programs