My issue isn't on the faith in probiotics side...the problem is which ones do I buy. It's near impossible to know you're getting the good stuff so to speak.
By "luck" I mean I haven't got the common cold in over 2 years since I started taking them. I'm sure there are other variables I'm not taking into account, e.g., exercise and healthy eating, my age (35), etc. but they're inexpensive and I don't see any reason not to take them.
EDIT: here are the strains that this brand includes (notably Lactobacillus plantarum, as mentioned in the study):
Lactobacillus acidophilus DDS-1, Bifidobacterium lactis, Lactobacillus plantarum, Lactobacillus casei, Lactobacillus rhamnosus, Lactobacillus brevis, Bifidobacterium longum, Lactobacillus salivarius, streptococcus thermophilus, and Bifidobacterium bifidum