Algin has been shown to absorb both heavy metals and radioactive toxins. Although I haven't found information that specifically refers to bismuth, it seems only logical that algin will help absorb whatever toxins are in the colon.

Here's more detailed information about Algin:

Algin

As far as adding Algin to Cutler's detox protocol, or any others for that matter, you would want to take Algin about 1 hour away from the time you take any other supplements or detox products. The reason for this is that because Algin is very absorptive, you don't want to take it at the same time as other supplements and run the risk of decreasing their effectiveness.

I typically take Algin at night before bed, first thing in the morning when I get up, and if needed, in the middle of the day in between meals (which is when I take most of my supplements).

However, if you know you're going to be eating something that either might contain mercury or promote the chelation of mercury (such as cilantro), then you could take Algin with this food, to help reduce any mercury-induced side effects. For example, once in a great while I will have a small amount of salmon. If I take Algin before and after eating the salmon, I'll experience little to no mercury-induced symptoms afterwards. However, if I don't take Algin, then I'll experience anywhere from mild-to-moderate symptoms for the next 24 to 48 hours or so.

Hope this helps!