Pecans are high in fat but they are not necessarily an unhealthy food destined to be eaten only by those unconcerned about their health or calorie intake. New research shows that these tree nuts may help reduce low density lipoprotein (LDL), or "bad" cholesterol -- a type of cholesterol associated with heart disease.

During the 8-week study period, neither group was asked to follow a specific diet. Those who ate the pecans lowered their LDL cholesterol level by 10% as early as the fourth week.This decline was still evident after 8 weeks, although not as pronounced (a 6% drop). In contrast, the individuals who did not eat any pecans had no change in LDL cholesterol or total cholesterol during the study, and had higher levels of both compared to the pecan-eaters.

The study results were not surprising as previous research on walnuts and almonds have shown some similar results. However, nuts have not always been so favorably regarded, as nutritionists and other healthcare professionals were telling folks to stay away from nuts because they are high in fat.

Pecans are 53% fat by weight. Yet, 29 of the 47 grams of fat contained in the daily ration of pecans are in the form of monounsaturated fat. Monounsaturated fat is believed to help lower LDL levels and may also prevent blood clots, which can cause heart attack or stroke. Tree nuts (such as pecans) are also good dietary sources of fiber, vitamin E, copper and magnesium.

Journal of the American Dietetic Association March 2000;100:312-318