This is an interesting study -- Finally! It's not fat that makes you fat.
"Researchers looked at data on nearly 90,000 men and women from six different countries. Participants were followed for up to 10 years. Analyses that accounted for several factors found no relationship between how much weight people gained and how much fat they ate, or their intake of polyunsaturated fats versus saturated fats." Reuters Dec 11, 2009
90,000 is a good amount of study participants from which to draw sound conclusions from. This is good news because the average person is "fat-phobic". Eating fat at every meal and snack (choosing more "good" fat) is a sure fire way to LOSE weight. However, you do need good fat from a health perspective, to allow your cells to be permeable enough to push toxins out and allow nutrients in.
Good sources of fat:
Nuts, seeds, nut butters (excluding peanuts)
Olives and olive oil
Cheese (in moderation)
Kefir, organic yogurt (in moderation)
Flax seed oil and ground flax seeds
Chia seeds (Milled or ground)
Organic butter (in moderation)
Organic coconut oil
All hydrogenated oils
Margarine (even if the label states it is made from olive oil -- it's still highly processed to the point of losing all the beneficial properties of the oil)
Soy, corn and safflower oils
All fats heated to very high temperatures in processing and frying