Gut pro. Similar strains. FiveLAC has different strains.

Our biomed dr. recommends Klaire Labs Therbiotic Complete but it's pricey. I have also used Inner Eco Probiotic Coconut Kefir, which is cheaper.

Natren superdophilus - powder form
(Easier to control doses) recently switched to this... Supposed to be the best quality wise on the market

Culterelle!! They sell at costco now :)

Culterelle - no need to switch either. wonderful for us!