Understanding the B12 Vitamin Shot: Benefits, Risks, and Dosage Guide What You Need to Know About Vitamin B12 Duane NP A vitamin B12 deficiency can cause a range of symptoms, including some that appear in the mouth Experiencing any of these symptoms? B12 supplementation might be right for you. Some causes of low B12 are diet, alcohol use, certain diseases like Chrohn's and Celiac Disease, and Gastric Bypass surgery, Vitamin B12 Injections Precision Health & Training