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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

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You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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