Its really good for flight crew because it helps with fatigue, weight gain, depression, and other stuff we face with this job....I have been using it since November and I honestly do feel a difference.  Not to say I have all the energy in the world but instead of hopping in bed as soon as I get to my hotel, I feel this push to get out and be productive.  Which is really what it came down to for me.  I was sleeping way too much and isolating myself on layovers as well as home.  It also helps improve my mood and my sleep! 

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NH

Flight Attendant