Avocados lower cholesterol and dilate blood vessels. Avocados contain a nutrient called glutathione, which blocks carcinogens while helping the liver detoxify synthetic chemicals. You Might Also Like Papaya November 8, 2013 Top herbs and spices that can help combat and prevent type 2 Diabetes include April 22, 2015 Avocados lower cholesterol and dilate blood vessels December 5, 2014