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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.
Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
On average, the stomach produces 2 L of hydrochloric acid per day.
Vaccines prevent between 2.5 and 4 million deaths every year.
More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.