It is approved as a food additive. But it now appears that sucralose can dampen T-cell-mediated immune responses, suggesting it could be a means of treating T-cell-dependent autoimmune disorders. While stressing (repeatedly) that they were studying intakes well above normal, at high but achievable doses sucralose has an unexpected effect on T-cell responses and functions in autoimmune, infection and tumor models, researchers at The Francis Crick Institute, London, reported in Nature March 15, 2023.