I've used these and they're good. Their digestive enzymes are good as well. I wouldn't trust any of non-refrigerated grocery store brands.
http://www.giprohealth.com/probiotics.aspx
You can also get Rx probiotics from a pharmacy (in single use packets). I think they are pretty expensive without insurance though (around $250 for a month's worth) but may be cheaper than the above if you only have a co-pay.
You can also make your own yogurt. Letting the yogurt ferment a full 24 hours instead of 4 to 8 produces a lot more of the probiotics and reduces the amount of lactic acid left, but can be a pain to make (normal yogurt makers will usually overheat).
You can also get Rx probiotics from a pharmacy (in single use packets). I think they are pretty expensive without insurance though (around $250 for a month's worth) but may be cheaper than the above if you only have a co-pay.
You can also make your own yogurt. Letting the yogurt ferment a full 24 hours instead of 4 to 8 produces a lot more of the probiotics and reduces the amount of lactic acid left, but can be a pain to make (normal yogurt makers will usually overheat).