I didn't know you could buy OTC serotonin.I dunno if it would help anyway. Most of the drugs block specific receptors and if serotonin gets to the wrong receptors it would speed you up. (one of the receptors is the speed it up switch).I'm not sure, but I think IBSers are more likely than other people to have abnormally high blood serotonin levels after eating, so I don't think adding more would be a good idea.K.
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