New diagnosis, has anyone tried the Care Oncology Protocol treatment?

Has anyone tried the Care Oncology Protocol through their clinic in London? I have recently been diagnosed with a GBM, had surgery before Christmas and am currently in the middle of radiotherapy and chemo. I’m just desperate to do everything I can to improve my outcome and wonder if anyone has had success using the Care Oncology Protocol. It’s a private clinic and would involve extra medication as well as NHS standard of care. I’m meeting with my NHS consultant to discuss it Monday. It’s not extortionately expensive (relative to most private healthcare!) but I just wondered if anyone had any experience of it. Thanks very much for reading and best wishes to all on this forum with your own challenges.