Sucralose is safe from a food safety point of view, and there is a steady stream of research being funded by private companies to promote their own product. The upper limit for sucralose is 5 mg/kg bw/day, this is 350-400 mg for an average body weight (Artificial Sweeteners - SHP - Nutrition Trends | UAB - https://www.uab.edu/shp/nutrition/) Up to this amount, EFSA considers it safe.
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