I recommend an EC stack. At first, I recommended an ECY stack, but after careful consideration, and more [science] research, I came to the conclusion that EC was all that was necessary, and you could also stack EGCG and synephrine HCL too, but limit your yohimbine HCL with ephedrine, as that combination, isn't scientifically 'ideal.'
EC or YC but try not to do ECY...
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Basics of the ECY Stack