It's been my experience that pineapple does nothing but make it filmy and bitter. Of course it's possible there were other variables that contributed to that, but pineapple or acidic fruit was always apart of the filmy bitter taste situations. Fortunately, that's not happened in quite awhile.
Protein is almost a sure thing. High protein diet will give you that great manly, healthy, sweet, cum taste (yes, there is such a thing.

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One thing to consider... it probably takes more than just that mornings diet to make a difference.