A 15-year-old boy complains of vomiting, anorexia, and weight loss. Laboratory studies reveal: serum calcium 13 mg/dL (normal 8.7-10.6 mg/dL); blood urea nitrogen 36 mg/dL (normal 7-22 mg/dL); serum creatinine, 1.8 mg/dL (normal 0.3-0.7 mg/dL). He has been taking several high-potency vitamin supplements daily for the past year as part of a 'body-building' program. An excess of which of the following vitamins is the most likely cause of these findings?
A) Vitamin A
B) Vitamin B
C) Vitamin C
D) Vitamin D
E) Vitamin E

Question

Quizplus · Accepted Answer

The symptoms and laboratory findings are indicative of hypercalcemia, which can be caused by excessive intake of Vitamin D. Vitamin D enhances calcium absorption from the gut, leading to increased serum calcium levels.

A 15-Year-Old Boy Complains of Vomiting, Anorexia, and Weight Loss