NANP Board Practice Exam

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Which heavy metal can commonly be found in some over-the-counter antacids, processed cheeses, and tap water?

  1. Aluminum

  2. Lead

  3. Mercury

  4. Zinc

The correct answer is: Aluminum

The correct answer is aluminum. It is a common component in various over-the-counter antacids because it acts as an effective antacid that helps neutralize stomach acid. Additionally, aluminum can also be found in processed cheeses, where it may be used as an emulsifying agent to maintain texture and stability. Tap water may contain aluminum as a result of certain water treatment processes that can introduce it from the environment. Other metals listed have distinct sources and are not typically found in those common products. Lead is primarily associated with older plumbing systems and some types of paint, while mercury and zinc are not commonly used in antacids or processed foods to the extent that aluminum is. This makes aluminum the most relevant answer regarding its prevalence in the specified items.

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