How Long Do Vitamin B12 Injections Stay In the Body? B12 Happy Hour B12 Vitamin Shots Santa Rosa, Sonoma, Mendocino The Naturopathic Integrative Medical Clinic of Santa Rosa 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, Alcohol depletes your B vitamins, especially B1, B6, and B12, which your liver needs to process toxins and your nervous system needs for energy and recovery., Taking a B Complex before (and even the Alcohol and Nutrition: Alcoholism and Nutritional Deficiencies How Long Does a Vitamin B12 Injection's Benefit Last? DripGym