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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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Excessive alcohol use costs the country approximately $235 billion every year.
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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.