Ah, but weightwatchers are cunts
A Purdue University study published in the International Journal of Obesity showed subjects who snacked on peanuts and peanut butter were shown to self-adjust their caloric intake spontaneously and did not add extra calories to their daily diets. After participants consumed the snack of peanuts or peanut butter, their hunger was reduced for two and a half hours!
weightloss.about.com/od/eatsmart/a/blppp_2.htm

Also
A moderate fat weight loss diet (rich in peanuts and high in monounsaturated fat) is better than the typical low fat diet for heart health because it resulted in a 14% reduction in cardiovascular risk, compared to a 9% reduction for the low fat diet.

Researchers reporting in the American Journal of Clinical Nutrition compared the effects of energy controlled, moderate fat (33% energy) and low fat (18% energy) diets on cardiovascular disease (CVD) risk factors during a 6 week weight loss phase, followed by a 4 week weight maintenance phase, in 53 overweight and obese men and women.

Also also:

In a recent small study where people were given a daily snack of peanuts, researchers were surprised to find that no one’s weight changed significantly after many weeks, despite the extra calories. Why? Seems peanuts fill you up (thanks to the fiber, protein, and healthy monounsaturated fats) but don't necessarily fatten you up, because the fat and calories in the nuts aren't completely absorbed by your gut. Now, if only Girl Scout cookies worked the same way.

Lost in Digestion
More good news about peanuts: We may burn off the fats in them better than we burn off the fats in potato chips or cookies. Our bodies break down the monounsaturated fats in peanuts and convert them into energy more easily than saturated fats. (Here's another kind of oil that can help you burn fat better.)
( The Light in Chains don't touch the Pope's boner, Wed 10 Aug 2011, 11:46, Reply)