I bought some imported American mustard yesterday. The front label includes the following blurb: “100% natural, gluten free, zero calories”. Zero calories? Bullshit I think. So I look at the nutrition information on the back. This is in the form of a white sticker that has presumably been added to comply with Australian labelling regulations. It says there are 300 calories per 100 g. That sounds a bit more realistic and seems to indicate the original label is a lie.
So my question is this: Is it legal/normal for American food labels to contain outright lies about the nutritional content of their food? I assume it must be legal, but is it normal?