In general, few people meet the daily nutritional needs of their body. If you’re diagnosed with an eating disorder there’s a high probability that you are missing out on a few, possibly even many, micronutrients. Your brain and body can be helped, or harmed, depending on what you’re eating (or, in many cases, not eating). Take, for example, B12 - a Vitamin B12 deficiency has been implicated when it comes to the development of depression.