NAPLEX Practice Exam 2026 – Comprehensive Test Preparation

Question: 1 / 1820

Which oral iron product has the highest percent elemental Iron?

Ferrous Gluconate

Ferrous Sulfate

Ferrous Fumarate

Carbonyl Iron

Carbonyl Iron has the highest percent elemental Iron among the options provided. Carbonyl Iron is a pure form of iron with approximately 98% elemental iron content, making it a highly concentrated source of iron. Ferrous Gluconate, Ferrous Sulfate, and Ferrous Fumarate also contain elemental iron but in lower percentages compared to Carbonyl Iron. Therefore, Carbonyl Iron is the correct choice in this question.

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