Fats - the problem is Saturated and Omega-6 Fatty Acids.Ojai Natural Foods, like many others, believes that many of American's dietary issues with fats stem not so much from the consumption of too much fat but excessive consumption of the wrong types of fats - mainly saturated fats (found mainly in animal fats and dairy) and Omega-6 fats. Such Omega-6 fats are polyunsaturated fatty acids or PUFAs that are found in high percentage in "Modern Vegetable Oils" and commonly used in the food industry because they are cheap and have an unnaturally long shelf life. Critics of Omega-6 PUFAs (and there are many) suggest that such fats "may promote harmful cell inflammation." The phrase, which includes the word "may" is obviously indefinite but does seem to capture the essence of the critique.
Good news is that food regulators have also signaled a change in their approach to fats with the FDA acknowledging that "the science related to public health recommendations ... has evolved" and that they no longer see their 1993 "low fat" regulatory approach as being a prerequisite of a "healthy diet". Rather, they now believe that foods that are not "low fat" could still be healthy provided "the sum of the monounsaturated fats and polyunsaturated fats are greater than the total saturated fat content of the food" and meet other nutritional targets. This is a good sign, in and of itself, and herald good thing to come from FDA actions in 20 years. However, the FDA is not able or willing to fight a battle against the Omega-6 PUFA lobby, clearly politically an impossible task. For more information on fats, see this post.