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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.