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Is viagra dangerous

a recent study suggests that staying physically active may reduce the number of colds you get. The study participants who were most active had 25 percent fewer colds than those who were least active. Experts [is viagra dangerous] offer this caveat is viagra dangerous is viagra dangerous, however: More is not necessarily better. Exercising too much can actually weaken the immune system and compromise its illness-fighting power. Source: BallyTotalFitness


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