All subjects will undergo two parallel 2-phase treatments. On one treatment, subjects will be placed on a low fat diet for one month (control run-in diet) and then for the second month will continue on the low- fat diet (i.e. low-MUFA) with the addition of the portfolio components. The order of these two phases will not be randomized. The other treatment will be similar to the above except that the background diet of the portfolio phase will be high in monounsaturated fat (high-MUFA). Subjects will be allocated randomly to either treatment. Diets will be metabolically controlled and all food will be provided at weekly intervals.