Nora, I think the difference is this: Biotic Defense is a “probiotic” which contains beneficial bacteria that are needed in all our guts. Some of us are without these beneficial bacteria and a supplement like this may help. The UltraImmune IgG sounds like an antibody supplement for your immune system….I had never heard of that before either so would also be interested in further explanation. I do think you could use both at the same time, but how do you know if you NEED both? I had a test for the intestinal flora so I know I need a probiotic, but not sure on the other.
I was also wondering if it would be possible to show the label/list the ingredients for these two prodcuts online. I am considering purchasing one or both of them, but need to see the ingredients.