I don't know about chlorophyll as a chelator, but I took it during my pregnancy. I was having a horribly stressful time (living with dh's grandparents) and having some really bad panic attacks and problems with anemia and my mw told me take it. I really liked it and it helped with the faintness that I was experiencing. I would just make up a big bottle of water with concentrace, chlorophyll, pregnancy tea and some raw honey and drink it during the day. It was really nice. I found one that was from nettles because I am weary of taking alfalfa, I also got the natural flavor instead of the mint. I think chlorophyll is high in magnesium which I was burning through like crazy with my stress.
I don't know about your circumstances, but I feel like the chlorophyll was worth it in mine.