Vitamin B12 deficiency can lead to various symptoms, and if left untreated, it can cause serious health problems. Here are some common signs and symptoms of vitamin B12 deficiency that require medical attention. Plant-based foods do not naturally contain B12, so people who follow a vegetarian diet or vegan diet need to make sure they get enough each day to avoid a deficiency. Speak to your doctor about your daily dose of Vitamin B12. #vitaminb12deficiency #vitaminddeficiency