Algin is a non-digestible polysaccharide that stays in the digestive system. It absorbs many kinds of harmful metals and some beneficial metals too (zinc, for example), so it should be taken away from meals and supplements.

It has a high affinity for barium, mercury, strontium, and other heavy metals.

I do not know its affect on DMSA or ALA, but since it does not enter the bloodstream, it does not likely affect them so long as they are not taken together.

Hope this makes sense.

More information about Algin: Algin