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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.
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The average office desk has 400 times more bacteria on it than a toilet.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.