Has anyone used it in regards to muscle fatigue & motivation/boost to get the workout going?

I have used it, but can't say it really gave me a "Boost". It's one of those sups that "Can" do a good number of things for you. Research it a bit, and you will find a good bit of info on it,...

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I've been looking at it for awhile- just trying to get some feedback from users.

What about creatine? :/