It's not a GNC product and they don't sell it, I buy mine at my local health food store...eating lots of yogurt should be good too but not likely as beneficial cuz yogurt doesn't tend to have enough bacterial culture in it (the primadophilus has 5 billion per cap)...you can use plain yogurt inside your vagina for yeast infections, ages ago my GP told me about
this and it does work well, I know it's sounds gross, but it works, thankfully I don't have to deal with yeast infections anymore since the primadophilus has done wonders for that as well.
Definitely check out your local health food store for it (not GNC) and if your local store doesn't carry it you could ask them to order it for you.
Here's a link to show you what the packaging looks like and info about it...
http://www.healthy.co.nz/primadophilus-reuteri-capsules.html
:)