MBSR has a growing evidence base, particularly for anxiety, stress, and the strain of living in a body that does not settle. The research includes a large randomized comparison with a first-line anxiety medication, meta-analyses in people without a psychiatric diagnosis, and mediation studies that try to explain how the practices help. Most of that work used the classic eight-week group course, which is close to what you will practise here and not identical to a 50-minute virtual session, so the match is real and slightly imperfect. That is a solid foundation, not a claim that an eight-week sequence will settle every nervous system. What you get still depends on the practice you actually do and the person guiding it.
Hoge, E. A., et al. (2023), JAMA Psychiatry. In a randomized trial of adults with anxiety disorders, an eight-week MBSR course was noninferior to escitalopram on interviewer-rated anxiety, with fewer people stopping because of side effects in the MBSR group.
Khoury, B., Sharma, M., Rush, S. E., & Fournier, C. (2015), Journal of Psychosomatic Research. A meta-analysis of MBSR in healthy adults found moderate associations with reduced stress, and smaller associations with improvements in anxiety, depression, distress, and quality of life, with high variation across studies.
Gu, J., Strauss, C., Bond, R., & Cavanagh, K. (2015), Clinical Psychology Review. A systematic review of mediation studies suggested that increases in mindfulness and reductions in rumination and worry help explain how MBSR and mindfulness-based cognitive therapy are associated with better mental health outcomes, while noting that many mediation studies had important design limits.