Wheatgrass contains laetrile-B17 that has found to be a cure for cancer. Wheatgrass has also been referred to as “Green Blood” because of the similarities between hemoglobin in the blood and chlorophyll found in wheatgrass.
I agree that wheatgrass isn't the best tasting juice around. If wheatgrass is not agreeable with your palette, why not try chlorophyll tablets? They are more expensive than growing and juicing wheatgrass, but at least you will still benefit from laetrile-B17.
Yes wheatgrass spray is so concentrated barely amy needs to be in a glass of water. A company called Sprouting Health makes a spray version that is so powerful it is used topically for pain, arthritic and even as a sleep inducer. No I do not sell it.
From the research I have done, a serving a day will be helpful to most people, unless, like me, you are allergic to it. It is great for cleaning out the colon and will help to get rid of parasites -- they hate veggies, especially the fresh green kind.
To make it taste better, make it using pineapple juice, instead of water.
...........As to cancer, I've not studied that at all, so no comment.