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Medical Review Board

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The Testing.com Medical Review Board is made up of health professional experts who review all scientific content on the website.
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Zinc Protoporphyrin

  • Test
Zinc protoporphyrin (ZPP) is normally present in small amounts in red blood cells but may be elevated in certain conditions. The ZPP test is used to screen for and monitor chronic lead exposure adults and to detect iron deficiency in children.
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Resources For Finding A Lab

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Testing.com provides resources that will help you locate accredited laboratories for testing in the U.S. and Canada.
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Lab Oversight: A Building Block of Trust

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High standards of quality for clinical laboratories are maintained by federal and state government, laboratory professional organizations, and individual laboratories themselves.
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Frequently Asked Questions

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Have questions about laboratory testing? We're here to help you understand your tests and what results might mean for you.
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Sleep Apnea Testing

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  • At-Home Testing
Sleep apnea is a disorder of disturbed breathing during sleep. Read our guide for details about the types of sleep apnea tests, including at-home tests.
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At-Home Cholesterol Testing

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  • At-Home Testing
Looking for information on at-home Cholesterol testing? Learn about how these tests work, what results may mean, and how to find a quality at-home Cholesterol test.
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