Dietary fats are not all the same. Some can be harmful while others are quite healthy. Some contribute to inflammation, some ease it. Omega-3 in particular is noted for its anti-inflammatory properties. I definitely would NOT recommend vegetable oil such as from soy or corn. It contains too much omega-6 fat, which causes inflammation. That type of fat will also suppress your immune system and contribute to cancer. I don’t tend to eat much of those at all, unless I’m eating in a restaurant that prepares the food with vegetable oils. I don’t use them at home. Animal fat from pasture-raised meat and dairy, olive oil, and coconut oil don’t contain much omega-6, so they should all be fine. In fact, these kinds of oils can help the immune system and protect against cancer. The type of fats you choose will make a difference in weight as well. Pig farmers tried using coconut oil to fatten their pigs. It didn’t work. The pigs stayed lean. Then they switched to vegetable oil, and the pigs got fat.