Just got your B12 injection? Heres why it matters what you eat: alcohol can block absorption, high sugar processed foods can spike inflammation, and greasy meals slow digestion all of which can Alcohol Vitamin Deficiency: Why It Happens & What to Do 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, Benefits of Vitamin B12 Shots Complete Health Partners Vitamin B12 Injections Feeling tired, low on energy, or just not like yourself? Vitamin B12 might be the boost your body needs Vitamin B12 plays a vital role in: