We just had another conversation about this very thing, and Jillypoo says aloe vera is not a humectant... http://www.naturallycurly.com/curlta...19962#poststop
I don't know what her source is, but I checked out your link (which is awesome, by the way!), and it does list aloe vera as a "water-binding agent," which, according to the same source, is synonymous with "humectant."
Nowhere does the CurlChemist list aloe vera as a humectant, which seems like a gross oversight if this is the case. (See http://www.naturallycurly.com/curlre...tants-and-hair
I think this is kind of a big deal.
I've been using aloe vera gel under the impression that I was imparting more moisture into my hair!! If I find out it's a humectant after all... I'll be very disappointed.