Testosterone plays a critical function in the regulation of adult male reproductive functions, sexual activity, fat metabolism, bone function, strength and muscle mass. As men age, testosterone levels begin falling, especially after they turn 30. This often results in a decrease in energy levels and muscle strength, mood fluctuations, increased osteoporosis, decline in cognitive functions..

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Electronic cigarettes or e-cigarettes were introduced as safer alternative to cigarettes. These battery-operated devices are designed to deliver nicotine in the form of vapor instead of smoke, but with less toxic chemicals that are produced by burning tobacco. Manufactured to resemble traditional cigarettes, cigars, pens, or USB sticks, e-cigarettes deliver nicotine with a flavoring and..

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