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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

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Everyone has one nostril that is larger than the other.

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Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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