our report tonight from nbc's gabe gutierrez. >> reporter: they're a supermarket staple. but now nutrition labels may get their first makeover in 20 years. >> everything i buy, i look at the label, especially now that i'm pregnant. >> it won't really make a difference for me, i like what i like and i'm going to get what i want. >> the government has taken the wraps off a new generation of food labels. >> reporter: in 1993, the food and drug administration first introduced the labels, revealing exactly how much sugar and fat we were consuming. but while our diets have changed, the labels have not. the fda says there is now a shift to focus on calories to help consumers construct healthy diets. >> the hope with the new label is that the calories perceiving will be prominently displayed right at the top so you know from the start what a serving is. >> reporter: health advocates are lobbying for other ways to