Diet to lower cholesterol by 20 percent of calories come from walnuts sources claimed to be able to reduce levels of LDL cholesterol by 12 percent. Nuts are generally high in calories, so with only about a handful (no more than 2 ounces or 57 grams) will provide benefits.
But remember, when you eat them with other foods do not overdo it. Overeating makes you fat and lead to heart risks.