Probiotics are live microorganisms that live in our digestive track. They are considered "good bacteria" and aid in the digestive process. It is thought that antibiotics, poor diet and artificial sweeteners (such as Sucralose/Splenda) kill this bacteria and that can interfere with weight loss.
Jorge Cruise recommended them in the class I took on the Belly Fat Cure in 2009. I thought I had never heard of probiotics, but once I researched them I realized I had. My youngest son used to get an upset stomach on antibiotics for chronic ear infections. He was prescribed liquid Acidophilous which I got from the pharmacy. I also found a section about Probiotics in an old Atkins book. I now see them as a cure all for many of our stomach problems.
Do you have to take them forever? Maybe, depends on your diet. It is completely possible to get enough probiotics without taking the pills, but it can be complex on a low sugar diet. Several foods that boast probiotics are diary products that are also high in sugar. A few examples of products you can have: certain sauerkraut, fermented vegetables and soy bean products, yogurt, kefir, kombutcha drinks.
There are tons of different probiotics pills sold at stores. You want one that has the most strains (different types of probiotics that have all those latin names listed on the back) and the most live organisms (measured in the millions/billions). Pick one with at least 12 different strains, but notice most brands only have only Lactobacillus Acidophils. Most quality brands will need to be refrigerated. Jorge Cruise recommended Natural Factors Ultimate Probiotic 12/12 and that is what I use. I get it on Amazon and at Vitamin Cottage. It has 12 strains and I give it credit for changing my digestive system.
Prebiotics are green vegetables that the probiotics feed on to stay alive. The Bug Juice recipe is a great Prebiotic. Once you have replenished your gut bacteria and are feeding it well, the flora and fauna of your digestive system should reward you. Less acid reflex, upset stomach, more regular and evenly sized bowel movements. Even less cold or canker sores and yeast infections should be an end result.
I found some good books on the topic too, if you are interested in learning more about it! It is actually really interesting stuff!