High in amino acid l-arginine, walnuts aid the liver in detoxifying ammonia. Moreover, walnuts contain glutathione and omega-3 fatty acids, which aid the natural liver cleansing process.
According to a 2008 study published in the Journal of Agricultural and Food Chemistry, walnut polyphenols prevent liver damage induced by carbon tetrachloride and d-galactosamine.
Apples contain malic acid, a natural cleansing nutrient that removes carcinogens and other toxins from the blood.
They are also a good source of pectin, a soluble fiber that helps remove toxins from the digestive tract and cholesterol from the blood, in turn preventing the liver from being overworked.