Lori Corbin of KABC LOS ANGELES talks about Probiotics.
She explains that Probiotics known as "friendly bacteria," are popping up in everything from pizza crust to candy. She is concerned as to whether the probiotics give any real health benefits, or are they simply marketing 

She suggests some easy ways to check to if you're getting any benefit. She says that chocolate is just one unique source of probiotics. Now they're in fortified pizza crust, coffee, snacks, coated drinking straws, even oral care and skincare products. The global market for probiotics is 
set to reach more than 32 billion by 2014.

She quotes Dr. Shekhar Challa, author of "Probiotics For Dummies" who says ... "Around 30 years ago, we used to take vitamins only if we needed them. Now we take vitamins because they help you with so many conditions .... I believe that's where we are headed with probiotics. We know they decrease the incidence of colds as well as benefit to women's health, decreased urinary tract infection, allergies, eczema, weight loss."

Corbin explains that are literally trillions of strains of probiotics, and research shows the benefits of some go way beyond digestive health. But finding one that works can be a challenge.

Corbin's suggestions are:
1   Stick with labels that list specific probiotic strains used. For things like pizza crust and coffee, that includes making sure the strains are heat-resistant.
2 Look for labels that list "colony-forming units" (CFUs) which is basically an estimate of the amount of viable bacteria cells in a product or supplement. Make sure there are enough CFUs per serving to deliver actual health benefits.
3 Challa says "There is enough evidence in the literature that one needs 3- to 5-billion CFUs on a daily basis."

We know that conditions like Ulcerative Colitis and Crohns Disease require loading, therapeutic doses of 450 billion strains per day or more.

Source: KABC on line Feb 2013