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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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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 high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.