On the other hand, was your friend able to produce evidence that cereal grasses (not the mature product) was good?
She may be having a placebo effect, or she may be so nutritionally deficient (as in her blood test variations) that the grasses do actually help her. It's likely that real food (like good 'ol liver, the original "blood builder") would do her a lot more good. Curious, is she a vegetarian?
I've had wheatgrass shots before, didn't notice a lick of difference. I really believe that people who react positively to grasses are really nutritionally deficient in something (that I wasn't). It's like B12 injections--some people get them and feel like they took a stimulant, they get so much energy. Those folks are seriously B12 deficient. I eat a good amount of red meat, I don't have digestive issues (ie. low HCl), and I take a multi that has B12 in it. I don't feel a thing from a B12 shot, because I don't have a deficiency.
Hope that helps.