Using an app to rate food for nutrition? Take the results with a grain of salt

Food apps can be useful because they put more information in the hands of the consumer. But different apps can give the same food different results.

Food apps can help you figure out what's in your food and whether it's nutritious. Just scan the barcode on the packet with your phone. But different apps can give very different results. Here's why.

(Image credit: AJ_Watt)