Even the biggest gurus will usually say to use wheat grass sparingly; yet Ann Wigmore was big on WG.
It can sometimes be TOO powerful and really knock ya one. I've had some before that gave me the shakes and I couldn't think straight; and other times, I got the nice energy boost.
As far as the comment, below, about not really being meant to eat very much in the way of greens, I think I have to disagree. Read Victoria Boutenko's "Green for Life". I might agree moreso in regard to WG, though - use sparingly.
I noticed in the protocols of some of the greatest healers ever, that WG isn't even mentioned.
As far as Fibro, I find that good, organic, fresh as can be APPLES do a lot. Apples contain malic acid, which is really beneficial for Fibro.
For me, lifestyle has made an enormous difference - however, sadly, in REVERSE order. "Back home", I was practically symptom-free and often even forgot I had Fibro. But six years ago, I moved across country into a WHOLE DIFFERENT WORLD - in all respects and it has really turned my health topsy turvy.
Now, even weather changes (which is daily) make me very sore; and often very nauseous.
As far as water goes, I have an Enagic Kangen water machine and I cannot thank GOD enough every day for one of the best things that ever happened. Drinking a GALLON, yes a GALLON of water every day, of micro-clustered, super hydrating, ANTIOXIDANT, alkaline water really helps alot. And when I consistenly only drink maybe a quart, or more and not at least 3 qts, I feel the difference.
Keeping to at least two of your meals raw a day will also make a difference. Easiest way is to drink green smoothies for one or two of the meals (they really FILL you up); or juicing; or a huge salad.
Whether you eat meat, chicken or fish or not is up to you as to what feels right for you and you listen to your body. The only importance there is that it be the cleanest, freshest quality possible - grassfed beef, etc.