People with hyperlipidemia can eat walnuts. Primarily, walnuts contain unsaturated fatty acids, which can lower plasma cholesterol levels, low-density lipoprotein levels, and increase high-density lipoprotein levels in the blood. However, as these unsaturated fatty acids are high in calories, excessive intake can lead to overweight or obesity. Therefore, even the unsaturated fatty acids in the diet should not be consumed in excess. Thus, people with hyperlipidemia can eat walnuts, but they should not consume them in large quantities. Moderate consumption is advised, as excessive intake could lead to excessive calories, causing obesity or overweight.