can vitamin b12 injections be harmful Common & Rare Side Effects of Feeling worse after B12 Injection:

Expert Perspectives: Balancing Hope with Prudence Clinical findings and patient experience, while promising, must be evaluated in conjunction with expert perspectives

Elevated B12 Symptoms: Signs of Too Much Vitamin B12 While rare, excessive B12 intake can lead to certain symptoms: Acne or rosacea Headaches Nausea and vomiting Diarrhea Fatigue Tingling in hands and feet It's crucial to note that these symptoms can also be caused by other conditions, so always consult a healthcare professional for proper diagnosis

*These statements have not been evaluated by the FDA and are not intended to treat or cure any disease

doi: 10.3389/fvets.2020.602907 9