I use to take the Digestive Advantage probiotics and they worked well for me, then they changed up the formula a little and they gave me the same response your yoghurt gave you. I will tell you though, soy really gives me grief.
I currently take Primadolphilis Fortify and like it alot. Maybe you just need to try a different probiotic to find the right one for you.
Gail*Nanners* Co-Moderator for Crohns Disease
Crohn's Disease for over 34 years. Currently on Asacol, Prilosec, Estrace, Prinivil, Diltiazem, Percoset prn for pain, Zofran, Phenergan, Probiotics, Calcium, Vit D, and Xanax prn. Resections in 2002 & 2005. Also diagnosed w/ Fibromyalgia, Osteoarthritis, & Anxiety. Currently my Crohns is in remission, but my joints are going crazy!