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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.
Illicit drug use costs the United States approximately $181 billion every year.
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.