I saw a brand new doctor today. She's on my insurance, but before I knew it, she had me spend nearly $600 for saliva tests and micronutrient testing. I was so excited about the potential that she had another way to look at my issues that I really wasn't thinking so clearly. But she really wants me to take an oral immunoglobulin supplement. It's a powder form and non-dairy. I have low natural killer cell activity and also leaky gut plus much more. It is from "non-dairy source of serum-derived immunoglobulin antibodies and immuno-proteins." I bought it, but before I open it, I really want to check it out. Does anyone have any experience with this? Or feedback? Thanks!