Sisig is pig face. Ears, jowl and snout are mostly skin, fat and cartilage, and the belly some cooks add is half fat. FatSecret lists pork sisig at 515 calories per cup, with 35g of fat and 39g of protein, and that is before the sizzling plate toppings. The protein is real, which surprises people, but the fat is higher.
The toppings are 170 of the 530. A raw egg cracked on top is 70 calories. The squiggle of mayonnaise most restaurants add is 15g, and mayo is 100 calories per 15g. Chicharon crumbled on top is another 55 per 10g. A plain sisig with just calamansi and onion is about 360 calories for the same 200g, which is a meaningful difference for the same dish.
A sisig plate in a Manila beer house is 150 to 250 pesos and is priced as pulutan for a group. In practice one person clears it with 2 cups of rice, which is 1,050 calories, plus two San Miguel Pale Pilsens at 150 each. That is a 1,350 calorie sitting. The sisig was never the whole problem, the setting was.