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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.