For example, sweet potatoes are famously nutrient-dense and delicious. We feel good about choosing these tubers with their rich, autumnal hue over their relatively less beneficial cousin, the white potato. But, if we're turning them into fries, then they're really not all that better for you. According to the Huffington Post, "One of the biggest issues is the temperature of the oil as a fried food cooks: not hot enough, and your food absorbs excess oil, leading to extra calories and fat on your plate." And, since you're probably not standing over the chef's shoulders, it might be best to opt for a sweet potato of the baked variety.
Also on the chopping block? Those "blueberries" found in cake and muffin mixes. Real blueberries are packed full of antioxidants. They're an amazing, delicious superfood. But, trying to get the benefits from your baked goods? Not going to cut it. Apparently, those little blue dots are created from "sugar, corn syrup, starch, hydrogenated oil, artificial flavors, and — of course — artificial food-dye blue No. 2 and red No. 40." Not exactly a superfood anymore.
Click through for the rest of the list of what you should never be doing to your superfoods. (The Huffington Post)