actually it might be psychological, I always go into my meds with an open mind, that is pretty helpful I think, but after taking it 2 days I started to notice less bm's(with an illiostomy), by the 4th day I had formed stools(with an illiostomy) and coudl tell I had more energy.
I take Primal Defense, by Garden of Life and you can get that from Vitamin store it has 12 species of probiotics, including Soil based organisms.
The principle behind soil based organisms, which Ibelieeve only this probiotic, primal defense, and one other have soil basd organisms, quite new, but the principal is our community and things we come in contact with are to clean...think about it, we are clean freaks, plus get vaccinations...if we didnt get vaccinations our body could build its own immunity intead of "injecting" immunity into us.