Has anyone with Parkinsons tried probiotic drinks such as Optibac or Symprove? Any improvements?

Hi, My partner has been taking Symprove for 3 weeks. He has a history of Ulcerative Colitis, now quiet, but ongoing bowel problems. Since starting the course he has found his stomach is less bloated, more comfortable and far less painfull wind. It’s early days, they recommend giving it 12 weeks and although it’s eyewateringly expensive he feels it’s worth carrying on. No change with the Parkinson’s yet.