Katy,
I'll throw my tuppance in.
When I first tried fresh wheatgrass juice some time in the early 90's I felt really very sick. I felt like being ill and came over all sweaty and had to go lie down. The taste was yuck as well.
Then when I found FF I decided to try the tablets to keep my FHS low after reading about the good effect it has. I was advised that the tablets could have a 'moving experience' side effect (well put Jules!

so I started slow with one tablet a day then built up to the 8 a day I'm on now. I've had no side effects with the tablets except to say that I don't need to use deoderant any more. I noticed that side effect when I ran out of tablets and wasn't taking them for 2-3 weeks.
Here's a really good web site for the tablets as recommended by a FF. Good price and fast delivery even though they are based in the States.
www.puregreenfoods.com
My hats off to you girls who drink the fresh stuff. You are braver than me!
x,
Almamay