I have history of picky disordered eating and now anemia?

Nutrient deficiency?: Anemia is a lack of red blood cells. To make red cells, your body needs iron, vitamin B12 and folic acid. It is unusual to be deficient is B12 or Folic Acid due to dietary choices because so many foods contain B12 naturally or are supplemented with folate. Iron deficiency can occur, especially in a premenopausal woman, if you don't eat red meat, dark green, leafy vegetables or supplements.