Yacon, when used in combination with silymarin, helps to enhance blood cholesterol and sugar levels in patients suffering from metabolic syndrome. This syndrome usually increases chances of heart disease and diabetes. In a study carried out, the participants took 0.8 grams of silymarin and 2.4 grams of yacon for a period of 90 days. The results indicated that this particular combination supplement helped in preventing fat as well as enhancing cholesterol levels. This showed that yacon and silymarin had the ability of promoting liver function as well as a healthy heart.