The researchers, led by Dr. Stephen Nicholls, a cardiologist now at the Cleveland Clinic, found that three hours after eating the saturated-fat cake and shake, the lining of the arteries was hindered from expanding to increase blood flow. And after six hours, the anti-inflammatory qualities of the good cholesterol were reduced.
But the polyunsaturated meal seemed to improve those anti-inflammatory qualities. Also, fewer inflammatory agents were found in the arteries than before the meal.
This further cements the case for adding more of the healthy fats to your diet while reducing the less healthy fats mostly animal fats and I would add hydrogenated fats to the list: Oils that have been produced by industrial means - margarines and many of the cheaper cooking oils.
Fish oils, flaxseed oil, olive oil, walnut oil and many others can be added to the diet to provide a healthy balance.