###Human: Kindly tell the treatment for acid reflux due to Vitamin B12 intake. ###Assistant: Hi. I understand all your concerns. Acid reflux is one of the adverse effects of taking Vitamin B12 supplements. I suggest that you test the vitamin B12 level as you have already taken supplements for three years. In case of mild deficiency, I suggest that you take foods rich in Vitamin B12 like clams and liver and stop the supplements. For acid problems, I suggest antacids like Maalox (Calcium carbonate) after meals.