Thank you very much for your question, and I am sorry to hear about your daughter's symptoms. I would recommend that you set up an appointment with a physician-- either a primary care doctor
or a gastroenterologist-- to have her further evaluated. Iron deficiency anemia and low protein levels can be caused by numerous conditions. Often they are found in gastrointestinal conditions that cause malabsorption. Celiac disease, for example, would lead to fatty, greasy stools and diarrhea
that prevent proper uptake of nutrients, including iron. Inflammatory bowel diseases such as Crohn's can also cause poor nutrient absorption. Lactose intolerance should also be considered. Separate from malabsorptive problems, slow bleeding of any source can cause iron deficiency. In young women, heavy menstrual periods are typically the cause. Another relatively common source of slow bleeding is the gastrointestinal tract. Finally, low protein and low iron levels could also be caused by poor nutrition. If you are concerned about your daughter's diet or are concerned about an eating disorder, she should certainly be evaluated. She may benefit from consultation with a nutritionist
for this reason. I hope that this was helpful, and I again strongly recommend that you make an appointment with a physician to discuss this further. Best of luck!