Some of the UK's biggest food firms have launched new labels to give people more idea how healthy their food is.
The change should make it easier for shoppers to work out how many calories and how much sugar, fat, saturated fat and salt is in their food.
Crisps, chocolate and some cheeses are among the first foods with more detailed information on their packets.
But health watchdogs aren't happy because they were just about to launch their own colour-coded system.
The Government's Food Standards Agency wanted a system based on traffic lights with green, amber and red labels.
Green-labelled food would be generally better for you while the red labels would have higher levels of salt and fat, which can be bad for you if you eat too much of them.
But food producers Danone, Kellogg's, Kraft, Nestle and PepsiCo have joined forces to launch their own scheme, which will be put on lots of their products.