Popular sweetener byproduct damages DNA in human cells

Key Points:

• A 2023 study identified sucralose-6-acetate, a genotoxic impurity found in commercial sucralose, and demonstrated DNA damage and gut barrier impairment in laboratory models, but these findings were based on in vitro and animal studies, not human consumption.
• The European Food Safety Authority's 2026 comprehensive review maintained that sucralose is safe at current consumption levels, finding no genotoxicity concern and retaining the acceptable daily intake of 15 mg/kg body weight per day.
• Additional genetic toxicity tests in 2026 on commercial sucralose largely showed negative results, with some ambiguous findings, and did not replicate the isolated sucralose-6-acetate experiments, highlighting differences in study focus.
• Human studies have explored sucralose's effects on appetite and metabolism, revealing mixed results on hunger and blood sugar regulation, but these findings are separate from DNA damage concerns.
• The safety of sucralose when heated at high temperatures remains uncertain due to potential formation of chlorine-containing compounds, leading regulators to withhold approval for expanded use in baked goods.