Wow! I can't believe a breast-feeding mother is spraying RoudUp! Actually, I find it incomprehensible that anyone would spray that stuff. It contains glyphosate, which has been proven to cause liver and kidney damage. It is is not nearly as quickly bio-degradable as everyone in this thread is saying. Also, if it rains soon after spraying, it can run off into other peoples' yards. How do you know their children aren't stepping in any run-off?
There have been several reliable university studies showing the deliterious affects lawn chemicals have on people, animals and the environment. One notable study showed that children who lived in households that sprayed lawn chemicals had a 6.5 times greater chance of developing leukemia. Why would anyone take that risk and put their children in harm's way? Unbelievable. Also, there are totally safe ways to have a nice yard. I haven't found a weed yet that couldn't be tackled with a weed-whacker.
I have no children myself, but I would never-ever spray any toxic chemical in my yard that a child could possibly walk through.
As for detoxing, calcium bentonite clay is good, as is diatomaceous earth. Activated charcoal is even better. Best of all, is not spraying any toxins in the first place. No toxins, no detox required.