How to choose?
Researching products that match your own needs is important. People can have allergies to certain substances, some people just don't like certain things, and many products can be cost prohibitive for some individuals.
I have two personal favorites: Paradise Herbs Orac Energy Greens and Amazing Grass Chocolate Green Superfood.

The other selling point for the Orac Energy Greens is the use of medicinal mushrooms. No other product that I know of offers this.
(Also see: Reviewing... Orac-Energy Greens)

Overall, I think both products are superior to most of what is on the market. The Paradise Herbs formula I believe is better for someone who is serious about making great strides with their health. The Amazing Grass formula is great for some one who wants something easy and tasty to grab in the morning, or for kids who are picky eaters.
A note about both: Each formula uses organic ingredients; each company is respected in the industry; both companies are known for using premium raw materials and exacting processing methods.
For those of you concerned about gluten, wheat grass does not contain gluten even though it comes from wheat. Gluten forms at a certain stage of growth and the leaves are cut before this happens.
