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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.
Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
There are more sensory neurons in the tongue than in any other part of the body.