There is no proof that probiotics make bipolar worse or impact it in a negative way, according to CTV News. In a Canadian study cited by CTV News, research shows that taking probiotics might help people with bipolar disorder. Definitive results from the study were pending as of May 2015.
The study being conducted in Toronto in 2015 looks at the effects that probiotics have on 50 patients with bipolar disorder.
Taking probiotics helps increase the amount of good bacteria in the stomach, explains CTV News. A test on mice showed that mice had mental health problems when they didn't have healthy bacteria in their stomachs. Once they were given probiotics, the mice showed less signs of depression and mental illness.