Go ahead -- slather on the spread. Bring on the salad dressing. Your heart is OK.
That's the message implied by a recent crop of products fortified with substances known as plant sterols or stanol esters. These naturally occurring components of plant cell membranes have cholesterol-lowering potential, and manufacturers are infusing any and all compatible products with them.
Since 2000, when the Food and Drug Administration permitted food makers to claim a link between pla