Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-164606 of Mead Johnson Nutrition Company on Form S-8 of our report dated June 25, 2015 appearing in this Annual Report on Form 11-K of the Mead Johnson & Company, LLC Retirement Savings Plan as of December 31, 2014 and 2013 and for the year ended December 31, 2014.

/s/ Plante & Moran, PLLC

Chicago, Illinois

June 25, 2015