A nurse is teaching a client who is pregnant and has a new prescription for an iron supplement. Which of the following statements should the nurse include?

Constipation is a very common and expected side effect of iron supplementation due to its effect on gastrointestinal motility. Clients should be advised to increase fiber and fluid intake. Iron is best absorbed with vitamin C (ascorbic acid), not protein. Iron turns stools dark or black — this is expected and not a reason to contact the provider. Urine does not turn orange with iron; that is associated with rifampin or phenazopyridine.