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An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.