Heavy ETOH Plus a Metallic Taste: Clues to What Deficiency?

This patient's presentation also included a pruritic rash around the nasolabial region and inguinal folds. What type of deficiency would you test for?

A 60-year-old man presents complaining of a metallic taste in his mouth of several weeks' duration. He has a long-standing history of heavy alcohol consumption. On examination, he has a pruritic scaly rash around his nasolabial region and inguinal folds.

Which of the following deficiencies is the most likely cause of this patient’s presentation?

A. Zinc
B. Copper
C, Thiamine
D. Folate
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