Are artificial sweeteners actually worse for you than sugar and/or HFCS?

Topic summary

Are artificial sweeteners actually worse for you than sugar and/or HFCS? — 30 sourced claims. In 2023, the IARC classified aspartame as 'possibly carcinogenic to humans' (Group 2B), though this is a haza… · A 2024 study linked high plasma xylitol levels to increased 3-year MACE risk and showed that consuming a xyli… · A 2023 study found that elevated circulating levels of erythritol were associated with a higher 3-y…

Key research questions

• Research this topic from public information: Are artificial sweeteners actually worse for you than sugar and/or HFCS?.

Important claims and supporting citations

• In 2023, the IARC classified aspartame as 'possibly carcinogenic to humans' (Group 2B), though this is a hazard classification rather than a finding that normal consumption causes cancer.

  • https://www.who.int/news/item/14-07-2023-aspartame-hazard-and-risk-assessment-results-released
  • https://www.cancer.gov/about-cancer/causes-prevention/risk/diet/artificial-sweeteners-fact-sheet
  • https://www.who.int/publications/i/item/9789240046429

• A 2024 study linked high plasma xylitol levels to increased 3-year MACE risk and showed that consuming a xylitol-sweetened drink caused plasma xylitol to surge 1,000-fold, increasing platelet responsiveness.

  • https://pubmed.ncbi.nlm.nih.gov/38842092/
  • https://pubmed.ncbi.nlm.nih.gov/36849732/
  • https://pubmed.ncbi.nlm.nih.gov/37246822/

• A 2023 study found that elevated circulating levels of erythritol were associated with a higher 3-year risk of major adverse cardiovascular events (MACE) and that erythritol hyperactivates human platelets.

  • https://pubmed.ncbi.nlm.nih.gov/36849732/
  • https://pubmed.ncbi.nlm.nih.gov/38842092/
  • https://pubmed.ncbi.nlm.nih.gov/37246822/

• In human colon tissue models, sucralose-6-acetate reduced transepithelial electrical resistance and increased epithelial permeability, potentially indicating 'leaky gut' effects.

  • https://pubmed.ncbi.nlm.nih.gov/37246822/
  • https://pubmed.ncbi.nlm.nih.gov/36849732/
  • https://pubmed.ncbi.nlm.nih.gov/38842092/

• Sucralose-6-acetate, an impurity in commercial sucralose, was found to be clastogenic (causing DNA strand breaks) at levels exceeding 0.15 µg/person/day.

  • https://www.tandfonline.com/doi/full/10.1080/10937404.2023.2213903

• The WHO issued a conditional recommendation in May 2023 against using non-sugar sweeteners for long-term weight control, clarifying that this was not a toxicological safety assessment.

  • https://www.who.int/publications/i/item/9789240046429
  • https://pmc.ncbi.nlm.nih.gov/articles/PMC9907347/
  • https://www.who.int/publications/i/item/9789240073616/

• In the 2022 Cell study, microbiota transferred from high-response human participants caused glucose intolerance in germ-free mice, suggesting a potential causal microbiome mechanism.

  • https://doi.org/10.1016/j.cell.2022.07.016
  • https://www.who.int/news/item/14-07-2023-aspartame-hazard-and-risk-assessment-results-released
  • https://www.who.int/news/item/15-05-2023-who-advises-not-to-use-non-sugar-sweeteners-for-weight-control-in-newly-released-guideline

• Research indicates potential benefits of replacing sugar-sweetened beverages with artificially sweetened beverages in specific contexts, though evidence quality remains a concern.

  • https://pmc.ncbi.nlm.nih.gov/articles/PMC11290234/
  • https://pmc.ncbi.nlm.nih.gov/articles/PMC12813387/
  • https://pmc.ncbi.nlm.nih.gov/articles/PMC10334147/

Competing explanations

• In 2023, the IARC classified aspartame as 'possibly carcinogenic to humans' (Group 2B), though this is a hazard classification rather than a finding that normal consumption causes cancer.

• A 2026 meta-analysis suggests that non-nutritive sweeteners may not be metabolically neutral compared to water.

• Observational studies link non-sugar sweetener intake to various health outcomes, but these findings are often confounded by baseline health differences.

• A systematic review found no significant association between low-calorie sweetener consumption during pregnancy and birth weight or childhood overweight, indicating inconsistent evidence.

Outstanding questions

• In 2023, the IARC classified aspartame as 'possibly carcinogenic to humans' (Group 2B), though this is a hazard classification rather than a finding that normal consumption causes cancer.