Masak lemak cili api is the heavyweight of the everyday lauk, and it is the coconut milk doing it. That rich yellow gravy is santan plus turmeric plus cili api, and the gravy alone is around 180 to 200 calories per serving before you add anything. So whether it is ayam, telur itik or pucuk ubi sitting in it, the gravy sets the floor.
It is delicious and very Malaysian, I am not telling you to skip it. Just know it is in a different calorie league from asam pedas. The vegetable versions like pucuk ubi and nangka are a bit lighter because the veg itself is low calorie, but the santan still soaks in. Spoon the gravy with a bit of restraint and you are fine.