IntermittentFasters-When do you have your Protein Shake?

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Hi my workouts are in the middle of my 16/8 fast. Now I'm trying to get more protein in my diet. So my question is, Do you have your protein shake right after your workout or at the end of your fast? I use Six Star Whey Protein triple choc. calories 170 carbs 6 and of course protein 20. Oh I have in my coffee, YumYum.