COLUMBUS, OHIO — Interstate Bakeries Corp. has closed a production line in Columbus, a move that will cost the bakery 38 of its 70 jobs at the plant.

Lew Phelps, a spokesman for I.B.C., said the job cuts reflected the plant’s inability to make a new line of all-natural bread as well as the loss of some private label business.

He said bread production previously handled at the facility will be transferred to the company’s bakery in Hinkley, Ill.

On Monday, I.B.C. debuted its first complete line of bread products to be introduced in several years. Nature’s Pride bread contains no artificial flavors or colors, no high-fructose corn syrup, no trans fats and no artificial preservatives.