I got NDF by Bioray, and I went a week on the smallest dose (ONE drop). It contains chlorella and cilantro in addition to probiotics and a small amount of alcohol (to preserve all of it).
I moved up to two drops today.
When I first tried it, I had a bit of mild stomach upset, but it gradually got better. Having moved up to two drops today, I have a mild bit of stomach upset again. I'll see if it goes away with time before moving to three drops. I think I may be able to tolerate this better over time. Which is good, because DMSA didn't help me. It just made me sick.
It will be quite a while, I'm sure, before I can see what the results are. But I think this might be able to help.