“A recent study was done of of Americans eating a self selected diet, but adding ¾ cup of pecan meat every day as a compulsory part of the food intake, increasing the fat content over matched controls. But those eating pecan experienced no weight gain, in spite of the fat content of the pecans, and their LDL or ‘bad’ choleserol levels dipped by 6%.

Pecans have quite a high vitamin E content – about 0.45%. They have a very high oil content, with 67 grams of fats per 100 grams. Of that, about two thirds is monounsaturated, most of the rest polyunsaturated. Pecans have a very small amount (about 0.7 grams) of linolenic acid, an omega – 3 fatty acid. Their protein content is relatively low, at around 7 grams/100 gram serving.”

http://www.naturalhub.com/natural_food_guide_nuts_common.htm