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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
The human body produces and destroys 15 million blood cells every second.
Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.
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.