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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

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