In a major study published December 8, 2008 in the Archives of Internal Medicine, results of the PREDIMED study were released. This very large study showed that participants who consumed a so-called "Mediterranean diet" supplemented with nuts (50% walnuts, 25% hazelnuts, and 25% almonds) achieved superior results in reducing Metabolic Syndrome, which is defined as having three or more of the following conditions: abdominal obesity, high triglycerides, low levels of good cholesterol (HDL), high blood sugar and high blood pressure.