This article is talk about, a 17-year-old teenager went to the hospital three years ago because he had been feeling tired. At the time, doctors said he was deficient in vitamin B12. Three years later, his vision began to blur and was sent to an eye hospital, Annals of Internal Medicine journal reports. Doctor said that most of his diet consists of French fries, chips, a few slices of bread, the occasional piece of meat, and no vegetables or fruits. The doctor examined his body and found that his body lacked a lot of important vitamins and minerals. He had been avoidant-restrictive food…