Here's a shocker for all of you. Remember how for years our doctors have told us to know our cholesterol levels, to be careful of high blood pressure and to stop smoking? Well, if you are worried about heart disease risk and risk of heart attack, the things you should be most concerned about are your free testosterone levels, HDL and your age. In one study published in the Journal Metabolism in March of 2004, researchers found that low testosterone levels posed the greatest risk for men and was the greatest predictor of heart attacks and clogging of the arteries. NOT high cholesterol, not diabetes, not smoking, not high blood pressure, not even being fat.