Probiotics is not a one-size-fits all solution. Everyone is different. You will have to experiment to find out what works for you. It may take several weeks to see if a particular type or brand works for you.
1. Look to see how much actual live bacteria is in the supplement. The largest amount I've ever found is in VSL #3 (http://www.vsl3.com/
). This is also the most expensive probiotic I've ever found.
2. Look for what types of bacteria are contained. It may be helpful to take more than one. You may not want to take two at the exact same time though as they might be competing with each other to become established.
3. There is debate about whether the probiotics in both supplements and natural food can really reach in the intestines or whether most of it gets destroyed by stomach acid. From what I've read, the best way to go for probiotic foods is kefir. You can try Lifeway kefir (http://www.lifeway.net/
). You can also try making your own.
4. Fiber helps probiotic bacteria grow in your gut. Make sure you are getting enough fiber or take a psyllium fiber supplement.
5. One of the better probiotics I've found is a soil based
probiotic called Prescript-Assist Pro (https://www.researchednutritionals.com/store/item.cfm?code=CRN121
). To order this probiotic, you have to your doctor's office call the company, but it's not actually a prescription.