To amend the special supplemental nutrition program for women, infants, and children to cover certain vitamins.

WIC Improvement Act This bill amends the Child Nutrition Act of 1966 to permit certain multivitamin dietary supplements to be purchased under the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) program. The bill applies to multivitamin dietary supplements that are: (1) labeled in accordance with specified federal regulations; and (2) increase the availability of low-cost, high nutrient alternatives for the population served by WIC.