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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.