ldsfireguy
Mostly you must order these ... I have looked over and over again at the offerings in this category available at my local Wholefoods, and Vitamin Shoppe. So far, I have not been very impressed with what is in those stores locally.
They always seem to have mushrooms, algaes, fillers, fruits, even sweeteners ... those are all things that I try to usually avoid. (BTW I love mushrooms, but I decided after reading people like Young and Cousens that I would not eat things that grow off dead things, in the dark and dank, etc...)
What you usually CAN find at a Wholefoods or Vitamin Shoppe is plain barley grass, or plain wheatgrass, or some simple combination of one or two of these. This if just fine IMO ... and when I run out I will buy some here, and then I may add some dried veggies and/or an herb mix to it. But it is always so much more expensive to buy the grass powders at the local store, so I only do it as a stop-gap until I can get it ordered.