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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
The average adult has about 21 square feet of skin.
Blood is approximately twice as thick as water because of the cells and other components found in it.
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
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