Vitamins, Cofactors, And Nutrition Practice Test

A 28-year-old woman presents with a 2-month history of persistent headaches, nausea, and blurred vision. She has been taking high-dose over-the-counter supplements, including one for her acne. On examination, she is afebrile with normal vital signs. Funduscopic examination reveals papilledema. Her skin is dry and scaly, and she has mild hepatomegaly.

A 2-year-old child, exclusively breastfed and with limited sun exposure due to living in a northern city, is brought to the clinic for well-child checkup. The physician notes bowing of the legs (genu varum) and widening of the wrists. An X-ray confirms rachitic changes in the long bones.