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In 1864, the first barbiturate (barbituric acid) was synthesized.
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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.
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Cyanide works by making the human body unable to use oxygen.
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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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IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

