To assess the effects of almonds on coronary heart disease (CHD) risk factors (serum lipids, measurements of oxidative stress and nitric oxide production) when added to the diets of subjects with high cholesterol. Also, to assess whether the amount of almonds consumed (i.e. almond dose) decreases CHD risk factors in a dose dependent manner. We hypothesize that since almonds have been shown to reduce serum lipids, we believe they will also increase nitric oxide levels related to their high levels of arginine and reduce markers of oxidative stress related to their content of bioactive phenolics. We anticipate that a dose-dependent relationship will be observed resulting in greater reductions in risk factors for coronary heart disease when greater doses of almonds are consumed.