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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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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.