Indeed it does. Each capsule contains a few hundred milligrams or about 1/4 teaspoon of probiotic plus other ingredients. Casein will account for less than 10% of the weight and therefore each capsule likely contains less than a 1/40 of a teaspoon of casein.
It is interesting how the research reports excellent results in IBS suffers using a probiotic containing a dairy ingredients. It seems another thing this research suggests is that minuscle amounts of diary in a probiotic supplement are probably fine for most IBSers.
By the way - in the VSL#3 trials the probiotic was mixed with 6 oz of yogurt before it was given to IBS patients. And the gastric and small bowel transit time was measured by having the subjects ingest two labelled scrambled eggs, a slice of whole-wheat bread and one glass of whole milk. And even with this dairy load some IBS patients reported an improvement in bloating
-------------------- STABLE: ♂, IBS-D 50+ years - Science of IBS