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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Thyroid conditions may make getting pregnant impossible.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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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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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.