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If cutting back on alcohol or tobacco has crossed your mind, even a short break can make a noticeable difference in how you feel day to day

It is a commercial activity involving the resale of electronic cigarettes, electronic devices that operate by heating a liquid called e-juice that creates a vapor that the consumer inhales

TOP 5 studies you may have missed (CNN) -- Here's a roundup of five medical studies published this week that might give you new insights into your health, mind and body

The lungs consist of several hundred million tiny air sacs called alveoli (an average of about 480 million in an adult lung) [53] that together provide a very large surface area for gas exchange, often compared to the size of a tennis court