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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.

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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

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Approximately 500,000 babies are born each year in the United States to teenage mothers.

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