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The average adult has about 21 square feet of skin.

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One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.

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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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