Caroline Porter & Stephanie Armour:

When the federal government implemented new school-meal regulations in 2012, a majority of elementary-school students complained about the healthier lunches, but by the end of the school year most found the food agreeable, according to survey results released Monday.

The peer-reviewed study comes amid concerns that the regulations led schools to throw away more uneaten food and prompted some students to drop out of meal programs.

Researchers at the University of Illinois at Chicago surveyed administrators at more than 500 primary schools about student reaction to the new meals in the 2012-2013 school year. They found that 70% agreed or strongly agreed that students, by the end of the school year, generally liked the new lunches, which feature more whole grains, vegetables and fruits, and lower fat levels.