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Area of Science:

  • Toxicology
  • Metabolism Studies
  • Food Science

Background:

  • Artificial sweeteners like sucralose are widely consumed.
  • Previous studies suggested sucralose is not metabolized and is excreted unchanged.
  • Concerns exist regarding the long-term safety of artificial sweeteners.

Purpose of the Study:

  • To investigate sucralose metabolism in rat intestine after repeated dosing.
  • To determine if sucralose bioaccumulates in rat adipose tissue.
  • To re-evaluate the safety and regulatory status of sucralose.

Main Methods:

  • Rats were administered sucralose daily for 40 days.
  • Urine and feces were collected and analyzed using ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS).
  • Adipose tissue was examined for sucralose accumulation post-administration.

Main Results:

  • Two new acetylated sucralose metabolites were identified in rat urine and feces.
  • These metabolites are more lipophilic than sucralose.
  • Sucralose was detected in adipose tissue two weeks after dosing ceased, indicating slow depuration.

Conclusions:

  • Ingested sucralose is metabolized in the gastrointestinal tract, contrary to previous findings.
  • Sucralose bioaccumulates in adipose tissue and has a prolonged depuration period.
  • These findings necessitate a review of sucralose's safety and regulatory status.