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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

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The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.

Three principle forms of natural selection: (a) stabilizing selection, (b) directional selection, an Three principle forms of natural selection: (a) stabilizing selection, (b) directional selection, an
Three principle forms of natural selection: (a) stabilizing selection, (b) directional selection, an Three principle forms of natural selection: (a) stabilizing selection, (b) directional selection, an
The various forms of spina bifida The various forms of spina bifida
Examples of Primary (Congenital) Forms of Immunodeficiency Examples of Primary (Congenital) Forms of Immunodeficiency
Characteristics of Three Forms of DNA Characteristics of Three Forms of DNA
Forms of carbon dioxide in the blood Forms of carbon dioxide in the blood
Video: TRH/TSH/Thyroid hormone

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