Vegetable and seed oils contain larger amounts of omega-6 fatty acids. These fats are important for your health, but some people eat too many of them. An excess of omega-6 fatty acids is thought to increase inflammation, and some studies support this. However, some other studies show that there is insufficient evidence to support the idea that omega-6 fatty acids have an effect on inflammatory markers. Most experts agree that more research is needed before any official recommendations can be made.