Fortunately, it sounds like the LD50 is pretty high.
Scientific studies have found it takes approximately 15 to 30 grams of garlic per kilogram of body weight to produce harmful changes in a dog’s blood. To put that into perspective, the average clove of supermarket garlic weighs between 3 and 7 grams, so your dog would have to eat a lot to get really sick.
Thing like garlic and onions are toxic for dogs, both of which are in pizza sauce
Fortunately, it sounds like the LD50 is pretty high.
Still best to avoid it if possible, obviously.