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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.
In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.