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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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People about to have surgery must tell their health care providers about all supplements they take.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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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.