Gruyere
While a slice of Gruyere contains a lot of good things — like protein and calcium — it also has about 117 calories and 9 grams of fat per ounce. That means if you put just two slices on your sandwich, you’re adding more than 200 calories and 18 grams of fat to your daily intake. Essentially, you’re consuming about 26 percent of your daily allowance of fat in just a couple slices of cheese — not good.