I also heard about probiotics "leaking" through the gut like the molecules of food do if you take them to soon with leaky gut. I couldn't tolerate the Culturelle in the beginning. I felt like I got a cold everytime I took them. It doesn't happen to me now. However it would be a big "catch 22" if you had to wait to take probiotics to heal leaky gut, but need the probiotics to heal the leaky gut!!

I think everyone may be a bit different with respect to which probiotic works for them.
I'm also a strong believer in Florastor because of how much it helped me. It has a secondary benefit of improving the mucosal layer in the gut. I've been taking Florastor for over a year now along with custom probiotics. Although, now I am down to a small maintenance dose. 1 cap a day. I did orginally start the Florastor because I had C. diff and poor mucosal lining in the gut. (score of only 80 with 400-800 being normal). I got it up to par in less then a year though. I'm also a strong believer in L-glutamine, again, because of how much it helped me. I still take 1 tsp 30 min before my breakfast.
chigirl