Probiotics?

Hi all, just wondered if anyone had any advice on probiotics, specifically for pwMS? There is a glut of info on the internet and I feel like I've waded through half of it... Would be interested to crowdsource people's thoughts! (Specific brands, etc.) I'm currently taking one BioKult a day and have just started on Ocrevus. I presume probiotics are safe for people on immunosuppressant drugs...? (I have struggled to find the answer to that one). I'm (very loosely) following OMS so not really consuming milk-based products, else I'd be eating lots of live yoghurt! Thanks all :)