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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Thyroid conditions may make getting pregnant impossible.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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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.