Now some companies want to use labels to help them pick everything from shampoo to milk, based on products’ carbon emissions. The growing use of so-called carbon labels comes as consumers ...

We broke down the ingredients on the back of the bottle. 1. Water ... Items like sodium citrate or citric acid on your shampoo label are added to keep shampoo at the right pH level.

The FDA not only dictates what can and cannot go into a bottle of shampoo or onto the label, it also holds sway over the sorts of claims manufacturers can make. So if, for example, a shampoo ...