Vitamin D Intoxication Associated with an Over-the-Counter Supplement

Abstract
As a group, fat-soluble vitamins are lifesaving at physiologic levels and dangerous at megavitamin levels.1 For many people the word “vitamin” implies something that is beneficial and essential, not potentially poisonous.2 More than one third of people in the United States regularly use dietary supplements.3 We describe a patient with hypercalcemia associated with the ingestion of an over-the-counter vitamin D supplement.

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