Final answer:
The supplement that Shelly should discuss with her primary care provider is Iron.
Step-by-step explanation:
The supplement that Shelly should discuss with her primary care provider is Iron. Iron is an essential mineral that plays a crucial role in blood production. Menstruation can lead to blood loss, which can result in iron deficiency anemia. Taking iron supplements can help replenish the iron stores in the body and alleviate symptoms of anemia.
However, it is important for Shelly to consult with her primary care provider before starting any supplement, as they can determine the appropriate dosage and duration based on her specific health needs. They may also recommend additional tests to assess her iron levels and identify the underlying cause of her menstrual problems.