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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
The familiar sounds of your heart are made by the heart's valves as they open and close.
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