Legally, what can be hidden under the banner of 'herbs and spices'?

Most food and beverages (except the alcoholic ones) have to list all of their ingredients on the familiar panel in unambiguous (or at least consistent) language so consumers know what they’re getting.

However, it seems that some ingredients can be ‘labeled’ by blanket terms like ‘herbs and spices’ or similar. What ingredients can be hidden like this? Can ingredients with a pharmacological effect be hidden this way?

Here’s what the FDA guidelines for food labeling say:

Source: http://www.fda.gov/Food/GuidanceComplianceRegulatoryInformation/GuidanceDocuments/FoodLabelingNutrition/FoodLabelingGuide/ucm064880.htm#spices

If a compound contains an active pharmacological ingredient, it would be labeled as a drug.

Herb

In the USA, the exact requirements for what can be called a “natural flavour”, “artificial flavour”, or “spice” are laid out in Section 501.22 of the Code of Federal Regulations:

So basically, all three types of ingredients have to be there primarily for flavouring purposes. “Spices” are whole or ground pieces of plants; “natural flavours” are substances extracted from plants or animals, and in the case of plants not consisting of the whole plant; and “artificial flavours” are everything else. The other sections I’ve linked to in the above quote basically contain long lists of plants, extracts, and chemicals that are included in the various categories, though of course these lists are not exhaustive.

and Spices.

Love you.

I’m a bit weirded out by all the things that one can do to something to extract “natural flavoring.”

Really, herbs and spices consist of herbs and spices. You can’t hide “chemicals” under this name.

Sure they can. Some herbs and some spices have a pharmacological effect.

The real world can’t be so easily separated into “natural” things that are good and “chemicals” that are evil. The natural and the chemical are legally separated out on ingredients lists in the U.S. but the effects of each group overlap with some in each group positive, some neutral, and some negative, all to greatly varying degrees and with different effects in different people.