The capsules are not enteric-coated, if that's what you mean. Instead, the product information indicates:

"Modified Release Formula Helps Repopulate Intestinal Flora"
* Prebiotic blend ensures optimal viability of these organisms in the digestive tract.

The "prebiotic blend" is comprised of short- and long-chain FOS (fructooligosaccharides). This substance "feeds" the healthy intestinal flora and is what helps propagate their growth (another reason why we should listen to our mothers when they tell us to eat our asparagus) <img src="/ubbthreads/images/graemlins/nausea.gif" alt="" />