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Caffeine Sensitivity: Is that second coffee helpful or harmful?

There is nothing quite like that first cup of steaming hot coffee in the morning. Or the second cup for that matter. Or the third. But is all that caffeine really good for you? There is conflicting data. That’s because that extra dose of liquid productivity is actually quite healthy for some and yet it’s not so good for others.

Fast Twitch or Slow Twitch: Which Are You?

Comments such as, “He’s got hockey in his blood,” or “She’s got running in her DNA” may be made in jest – but is there any truth to the notion that athletic ability could be determined by genetics? Could a DNA test predict whether you are likely to be a good weight lifter or long-distance runner?