Combining 21 Day Fix with X3

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I'm getting my 21 Day Fix tomorrow and I'm super excited!! I've done so great with the workouts in X3, but I'm struggling with the diet part! I really think the portion control part of the 21 Day Fix is going to help me be successful!! I'm excited to add it to my routine!! If anyone else is interested, let me know!! I'd love some company. :)