While "hydrolyzed", "protein", "amino acids" and other obvious proteins like soy milk or gelatin /collagen are fairly easy to spot, herbal extracts can also function as proteins. Plants have protein in them, so herbal (plant) extracts do too. They aren't generally as much of an issue as the "obvious" proteins, but can be problematic for some.
Some can use glycerin regardless of dewpoint, while others can't use it at all, or can in only certain dewpoints. If I don't want dry, frizzy hair, I avoid it in gels until dews are at least 40, preferably 50 or higher. It seems to be ok for me in conditioners /leaveins if they have a higher amount of oils or butters than glycerin in them.