The maker of Similac Advance, the top commercial baby formula brand in the United States, says it will begin selling the first mainstream baby formula made without genetically altered ingredients by the end of the month at Target.

Similac’s maker, the global health care company Abbott, said it would first offer a “non-G.M.O.” version of its best-selling Similac Advance, followed by a non-G.M.O. version of Similac Sensitive. Depending on sales, Abbott may offer other formulas free of such ingredients.

Abbott will join a growing number of companies offering popular products without genetically modified organisms. Consumer demand for such products has been growing, despite a concerted and expensive effort by trade groups representing major food manufacturers and the biotech industry to convince them that genetically altered ingredients are not harmful to human health.

“We listen to moms and dads, and they’ve told us they want a non-G.M.O. option,” said Chris Calamari, general manager of Abbott’s pediatric nutrition business. “We want to make sure we meet the desires of parents.”