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 deficiency can cause symptoms like headaches, fatigue, depressive mood, gastrointestinal issues, and more. While vegetarians are at a higher risk of vitamin B12 deficiency, it can affect non vegetarians too. Check Vitamin B12 Injections Precision Health & Training How Quickly Does a B12 Injection Work? Timeline and Expectations Bolt Pharmacy Signs You May Have a B12 Deficiency Vitamin B12 injection Redwood Pharmacy