A Whole Foods Market in Brooklyn, N.Y.

Shoppers are shirking the center aisles of the grocery store as they shift in ever-growing numbers to fresh meats, dairy and produce.

The trend toward healthier grub, which is being helped by falling prices for these fresher foods, is bad news for food makers , , , and , all of which were downgraded late Monday by Bernstein to underperform from"market perform.