You wouldn't think so from the messages we are constantly given and have been for the last 4 decades at least.
Following the movie "Supersize Me" aimed at the Fast Food industry, the issue was examined and taken to task in a much less publicised but also much less biased light-hearted documentary called Fat Head which has screened a few times on the Documentary Channel, most recently this past weekend.
For several years people have been told to avoid fat like the plague - so butter, cheese, eggs, nuts, red meat - among other things were out, but common sense is starting to prevail. What are the real villains according to this doco? Trans-fatty acids such as corn oil and soy oil, and excessive carbohydrates (as found in sugar, flour, pasta, potatoes and other things).
Of course we need a solid base of fruit and vegetables too.
The Doco-maker's blog.