From the latest Chi news [page 64], being the industry magazine for the ammonia-free colour range we use @ Wildilocks:
Docs need Chi to operate
When the new hairstyling team reports to work for the NBC comedy Scrubs, they were met with the following request from the cast: “Please don’t stop using our favourite CHI products!” We are pleased to report that the transition has been smooth and Chi remains the mane brand for Scrubs main men and women.
So not only do we have Threadless [that Zach Braff wears in just about every other episode], but they all have their hair done with Chi too. This makes me happy ^_^