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Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

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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.

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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.

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

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Video: Requirements for nervous signals

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