I have some experience with chlorophyl and blood loss. I have found a good pro and con discussion with references on this subject. I have it in my bloodless pile of papers and would need to find it if anyone is interested.
My mother-in-law was in a horrible traffic accident Aug 2004 and had a broken back in two places and hemotoma in the brain and collapsed lung from broken rib. Her hematocrit was eventually 13. The trauma center in Seattle did the recommended things from the Bloodless program at Providence in that city. I cannot remember when I was finally able to convince the staff to administer liquid chlorophyl but within two days of putting it in her feeding tube there was a marked rise in her hematocrit. Unfortuneately, the bloodless program had no knowledge or recommendation for this substance so the hospital only gave her what the label suggested, I forget what it was, something like a tablespoon. I used World Organics chlorophyll which is made from alfalfa. The only problem with it was occasional diarehhea which the nurses didn't like as it was a lovely color of green. It is also used as a laxative, although I have taken it for a couple of years and it doesn't do that to me.
Then in April 2006 my own mother was admitted to a transitional care center under the direction of the Bloodless Medicine program in Everett, WA to build her blood for knee replacement surgery. Again, I did not have the blessing of that program, but convinced her doc to give it to her. Same experience it brought her hematocrit up from 23 to 36 in two weeks along with their program. Again, only a tablespoon of chlorophyl. There again was some diarehhea involved. I wonder if that would be a problem with wheatgrass?
KathyPat