What's YOUR definition of clean?
I am going to play the devil's advocate. Please forgive my rambling musings.

Sorry to be a wind bag!
Is your diet REALLY clean?
As I understand it, clean is food in it's most natural state. That means minimal processing and additives. Not all foods can be enjoyed that way and require processing to be palatable. Olives are cleaner than olive oil until they are turned into the salty guys I eat. Have you ever tried eating an unprocessed olive. They are nasty!

Was your olive oil chemically or heat processed or expeller or cold pressed? Which do you use?
Butter isn't clean because it's a component of whole milk. Whole milk has all that fat, so is it less clean than the more processed skim milk? No, because fat is not unclean. Fat is natural and desirable, even saturated fat and hence, clean. If you drink milk in a clean diet, it should be unpasteurized and unhomogenized although you may get a bacterial infection from your separated milk. Trans fats are dirty. I don't consider any fat bad, except trans fats. I don't drink cow's milk because I am not a baby cow but I do use cheese, sour cream and butter from organically fed cows with no hormones or antibiotics allowed. Not clean per se, but cleaner than regular dairy to my mind. And very tasty with good qualities to circimvent over eating, texturree, mouth feel, satiety.
My clean diet has to have flavor even if it dirties t up a bit. Leaner cuts of meat are the better choice overall but they aren't cleaner by definition. Heck uncured bacon would beat cured bacon and vegetarian bacon, both processed foods. Is a conventionally grown apple, bathed in pesticides and waxed for preservation more clean than organic apple sauce?
My diet is not perfectly clean but it's at least 90% clean. Sometimes 95! I don't eat farmed fish or factory farmed meat and poultry. Fish has to be sustainable too. I prefer organics but at one point I was so obsessed about it I shopped daily and it became a burden. Google orthorexia. I can be a disordered eater so I have to cut myself slack lest I decide just to quit eating altogether. I have to keep the avowed carnivores in my family happy too. Although the husband tells me it's okay to buy conventioally raised food. It's cheaper and his wallet trumps his health. But not mine. In spite of 25% fat and 10% sat fat in my diet, I think it comes up clean because of my love of organics but I also trust my dear old liver to help me out when I can't get to the organics store and have to buy conventional. I also think when we think clean we think more than merely unprocessed. What do you think?
But a potato? Will no one love the lowly Potato. It's St. Paddy's day for heaven's sake!
I don't worry much about the glycemics of potatoes since I eat them with protein and fat, which reduces the glycemic effect.
Bobbi
http://www.handykult.de/plaudersmilies.de/chicken.gif "Chick's rule!"
Tell me, what is it you plan to do with your one wild and precious life? - Mary Oliver