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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
The familiar sounds of your heart are made by the heart's valves as they open and close.
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.
Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.