My anecdotal evidence suggests the probiotics that fix your pooping problems fix your mood too. If they make your poop worse, your mood will suffer as well.
Constipation has sometimes produced the bloodiest scenes. My grandfather, who died a centenarian, was Cromwell's apothecary; he has often told me that Cromwell had not been to the toilet for a week when he had his king's head cut off. - Voltaire
