The goal of this single-arm, mixed methods trial is to learn if it is feasible and acceptable to take a probiotic for 12-weeks in people with Multiple Sclerosis. The main question\[s\] it aims to answer \[is/are\]:
* Is it feasible and acceptable for people with MS to take a probiotic for 12-weeks?
* Explore impact on health outcomes? Participants will.
* Drink 70ml probiotic drink daily as prescribed for 12-weeks.
* All data collection will be done remotely.
* Before and after 12-weeks participants will complete an online questionnaire (Acceptability, lifestyle behaviour, symptoms, quality of life).
* Provide a stool sample to analyse microbiome changes.
* Take a short online cognitive test.
* Participate in a focus group.