hi veggie mom, i have the same problem. When I tried using the usual chlorella, I had the worst vomiting bouts I have ever known. Absolutely beyond belief and burst blood vessels in my eyes, the whole deal. I was like that for hours and the nausea with it was intolerable.

I was terrified at trying chlorella again. Seems that this can be due to the cell wall and some people do not digest it. I think if I'm not mistaken that Nature's Way chlorella has a cracked cell wall., so it might be ok.

The one I did tolerate was from the mercola website. Biotics Research coporation Chlorella caps. I gather it must be the cracked cell wall version, but I had no issues whatsoever with it.

Yet when I tried a chlorella capsule from a health lab we have here, I was violently ill just from that. So I am a real bad case senario in that regard.

Also, another alternative is getting .Nature's Way chlorophyll
which is made up mainly of alfalfa. It can still help chelate or encourage mercury removal I hear, but is better tolerated.

NDF is another way of taking chlorella, but more effective apparently. I've used it, and no vomiting or anything like that, it's in a nanonised form.