These are all of the ingredients in Velveeta Block Melting Cheese:
SKIM MILK, MILK, CANOLA OIL, MILK PROTEIN CONCENTRATE, SODIUM PHOSPHATE, CONTAINS LESS THAN 2% OF MODIFIED FOOD STARCH, WHEY PROTEIN CONCENTRATE, MALTODEXTRIN, WHEY, SALT, CALCIUM PHOSPHATE, LACTIC ACID, SORBIC ACID AS A PRESERVATIVE, MILKFAT, SODIUM ALGINATE, SODIUM CITRATE, ENZYMES, APOCAROTENAL AND ANNATTO (COLOR), CHEESE CULTURE, VITAMIN A PALMITATE.
Don’t be fooled by claims like “50% fewer calories” and “less fat than cheddar cheese”. Processed, block melting cheeses are certainly not healthier than regular cheese (even if they do have fewer calories). Canola oil is a highly inflammatory oil that can lead to a plethora of health issues. Food starch and matodextrin add hidden carbs to the cheese as well!  
Just one serving of Velveeta cheese contains three grams of carbs!
Cans of cheese dip are essentially the same thing, in melted form. These dips contain added inflammatory oils and fillers that add unnecessary carbohydrates!
It should come as no surprise that cheese in a can has hidden carbs and is definitely not on the list of healthy cheeses! Similar to melting cheese & cheese dip, spray cheese also contains soybean oil, another highly inflammatory oil. One serving of this cheese has two grams of carbohydrates.
So, What Type of Cheese Can You Have on Keto?
Stick to unprocessed cheeses that don’t come in a can! For a full list of keto-friendly cheeses and how many carbs they contain, check out our article: Carbs In Cheese.