Eating nuts as part of a healthy diet can be good for your heart. They contain unsaturated fatty acids and other nutrients that can help lower the LDL, or “bad,” cholesterol level in your blood. High LDL is one of the primary causes of heart disease. Even though most fat in nuts is healthy fat, it’s still a lot of calories. That’s why you should eat them in moderation, 13 oz is all you need, just make sure they are not covered with chocolate, sugar or salt.