Nuts are often considered healthy choices. Most nuts contain these healthy substances: unsaturated fats, omega-3 fatty acids, plant fiber, L-arginine, plant steroids and Vitamin E.
Unsaturated fats (monounsaturated and polyunsaturated fats) are believed to be healthier fats, because they can reduce unhealthy cholesterol. Omega-3 fatty acids tend to prevent harmful heart rhythms, thus reducing heart attack risk. Plant fiber can help to lower cholesterol level and prevent diabetes. L-arginine can help artery wall reduce blood clots. Plant steroids can also help lower cholesterol level. Vitamin E is believed to help reduce artery plaques.