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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
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Green tea is able to stop the scent of garlic or onion from causing bad breath.
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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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Cyanide works by making the human body unable to use oxygen.
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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.