From what I have read on the various relevant www sites... it certainly seems to be a bad idea to bring in any banned substance ... even those normally deemed quite innocent.

List of banned substances:
http://www.moh.gov.ae/admincp/assets...ted%202007.pdf

Article about the situation:
http://www.ameinfo.com/147878.html

I am wondering even about vitamins and supplements. Although not banned, they may attract attention and cause delays while they are being tested.