That is a great point about iron and ferretin levels. They should be monitored by a sports med doc at this high level of competition and age. Foot strike anemia is very common and athletes beginning puberty can have iron loss as well. It usually not until levels have dropped really low and performance suffers that they get it checked out. Vit D also impt for growing healthy bones. Sounds like she has a great coach who is knowledgeable about all of the factors and made the right decision for her health.