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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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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

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If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

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