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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.

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According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

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Everyone has one nostril that is larger than the other.

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Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

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There are 20 feet of blood vessels in each square inch of human skin.

Giraffe bending down to drink. The animal's rete mirabile prevents excess blood flow to the bra Giraffe bending down to drink. The animal's rete mirabile prevents excess blood flow to the bra
Blood Clotting Mechanism Blood Clotting Mechanism
Blood Flow Blood Flow
Blood-brain barrier Blood-brain barrier
The proportion of men and women with elevated blood pressure or taking hypertension medication incre The proportion of men and women with elevated blood pressure or taking hypertension medication incre
Blood pressure Blood pressure
Video: Exercise and cardiac output & Definition of stroke volume

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