Fats=bad Rap? new research

Saturated Fat
This type of fat is derived from animal sources. You generally find it in meat, butter, and dairy products. Saturated fat has gotten a really bad reputation over the years because it raises LDL cholesterol, but it turns out that saturated fats also do good by elevating your HDL cholesterol. Since the effects of saturated fats on LDL and HDL appear to cancel each other out, researchers are starting to change their tune. Now, saturated fats are considered good in moderation. And animal proteins are no longer under suspicion for being the main culprits in raising cholesterol and increasing your risk of diabetes: Instead, it turns out that processed carbs (like Twinkies!) are to blame.



source (http://www.jillianmichaels.com/fit/lose-weight/facts-on-fats-and-carbs)