All over the internet we can see reference to anti-inflammatory diets and anti-inflammatory property of general food. Examples:
Experts discuss the potential disease-fighting benefits of diets that try to reduce inflammation. [...] The average American diet, Greenfield says, includes far too many foods rich in omega-6 fatty acids, found in processed and fast foods, and far too few rich in omega-3 fatty acids, such as those found in cold-water fish or supplements. When that balance is out of whack, inflammation can set in, Sears explains.
Eating high levels of saturated fats, trans fats, and refined sugars (read: the modern American diet) sets off a series of reactions: The "bad fat" triggers the liver to release chemicals to fight the toxins, which causes inflammation. Meanwhile, the glucose in food can't be transported to your cells while the body is inflamed, which means that your brain isn't registering the intake. The result: You're left feeling foggy, hungry, and more prone to cravings, which then restarts the cycle.
At the heart of the program is the revolutionary IF Rating system that, for the first time, tells you the inflammatory or anti-inflammatory effects of all of the foods you eat.
Do saturated fats and refined sugars trigger inflammation?
Wkipedia mentions anti-inflammatory food in relation to some Prostaglandins "hormones" but how relevant is this? More interestingly some food has been labeled as having pro-inflammatory property like eggs.
My question is: Is there a measurable effect for a regular food or diet? And have any real medical studies been conducted?