What people don’t know about the McDonald’s fries is that they put flavoring on it. No wonder it tastes so delicious – there is beef flavor to the potatoes. One medium size French fries has 340 calories with fat content of 16 grams. As for the carbs content, the French fries are loaded at 44 grams. The alarming fact about this is that the fries are cooked in oil with trans-fat. If you are looking for something crispy, just go for apple slices. It’s not fries but at least, it’s healthy.