Well according to
this thread which is supposed to be a guideline for people looking to bulk it says..
5. The separation of Carbs and Fats- This is a hotly debated issue, but again, in my opinion, an important aspect nonetheless. Remember that it is often when you eat items and with what you eat them that is more important than what you are eating. A mouthful, I know, but stay with me. Remember that when you take in certain carbs, you can spike your insulin levels. If you are taking in fats when your insulin has been spiked, you are allowing the basic laws of physiology to act out, and you allow for a higher propensity for fat storage. Separation is key. The sample diet will give a good example of how to separate them.
So that is why I have separated them so much.
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Jack