Primal Defense is the name of the Probiotics made by Garden of Life. They are expensive if you live in Canada. Ordering on-line can save you up to $20. Here is a web-site that lists the product...it is closer to the bottom of the page: http://www.naturalhealthshoppe.com/index.asp?PageAction=VIEWCATS&Category=324
I think reaction time varies...I was told by a health professional that it can take up to 3 months to notice all of the benefits of taking them, but that's not to say that you won't notice some improvements right away. I think the point is that you have to take them consistently over a period of time for them to be the most effective. For me, I was so sick and battling my UC when I started taking them that they didn't really help me at all. However, after reading skinsfan's post I might try and take them again when I get my j-pouch in December.