[Wolfram]

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But it is certainly plausible to me that I am far overestimating just how "clean" my diet is.

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ORLY!

List of bad things in your example:
-Pretzel sticks (bad carbs)
-Garlic bread (bad carbs, saturated fat)
-candies/twizzlers (bad carbs)
-Soup (can be bad, can be good, depends on kind)
-Rice Cakes (don't be fooled by the 80's low-fat health craze. These are awful for you.

And you might be eating to much fruit as well (spikes your blood sugar which induces fat storage and cravings I believe).