Food & Drink / Compounds / Sucralose

Sucralose in food: ingestion safety

Low risk

(People-specific data is limited; this page draws from human adult context.) Sucralose presents low risk to human adults at current approved ADI levels, based on established regulatory assessments. Emerging concerns — sucralose-6-acetate (S6A) genotoxicity in vitro, gut microbiome disruption, and high-temperature thermal degradation products — represent signals under active scientific and regulatory scrutiny (EFSA re-evaluation ongoing as of 2024). The WHO 2023 NSS guideline advises against sucralose (and other NSS) for weight management, noting insufficient evidence of long-term benefit. Consumers choosing to minimize NSS exposure can substitute with other options; those who use sucralose should avoid high-temperature baking applications where thermal degradation products form. Not currently classified as carcinogenic.

What is sucralose?

The IUPAC name is (2R,3R,4R,5R,6R)-2-[(2R,3S,4S,5S)-2,5-bis(chloromethyl)-3,4-dihydroxyoxolan-2-yl]oxy-5-chloro-6-(hydroxymethyl)oxane-3,4-diol.

Also known as: (2R,3R,4R,5R,6R)-2-[(2R,3S,4S,5S)-2,5-bis(chloromethyl)-3,4-dihydroxyoxolan-2-yl]oxy-5-chloro-6-(hydroxymethyl)oxane-3,4-diol, Splenda, Trichlorosucrose, Aspasvit.

IUPAC name
(2R,3R,4R,5R,6R)-2-[(2R,3S,4S,5S)-2,5-bis(chloromethyl)-3,4-dihydroxyoxolan-2-yl]oxy-5-chloro-6-(hydroxymethyl)oxane-3,4-diol
CAS number
56038-13-2
Molecular formula
C12H19Cl3O8
Molecular weight
397.6 g/mol
SMILES
C(C1C(C(C(C(O1)OC2(C(C(C(O2)CCl)O)O)CCl)O)O)Cl)O
PubChem CID
71485

Risk for people

Low risk

Sucralose presents low risk to human adults at current approved ADI levels, based on established regulatory assessments. Emerging concerns — sucralose-6-acetate (S6A) genotoxicity in vitro, gut microbiome disruption, and high-temperature thermal degradation products — represent signals under active scientific and regulatory scrutiny (EFSA re-evaluation ongoing as of 2024). The WHO 2023 NSS guideline advises against sucralose (and other NSS) for weight management, noting insufficient evidence of long-term benefit. Consumers choosing to minimize NSS exposure can substitute with other options; those who use sucralose should avoid high-temperature baking applications where thermal degradation products form. Not currently classified as carcinogenic.

Regulatory consensus

3 regulatory and scientific bodies have classified Sucralose. The classifications differ — that's the data.

AgencyYearClassificationNotes
IARC2020Not evaluated by IARC for carcinogenicity — sucralose (1',4,6'-trichlorogalactosucrose; Splenda; E955) is a chlorinated disaccharide non-nutritive sweetener approximately 600× sweeter than sucrose; FDA approved 1998; EFSA ADI 15 mg/kg/day; not classified as carcinogenic; emerging safety concerns include gut microbiome disruption, pro-genotoxic effects of sucralose-6-acetate (a metabolic intermediate identified in 2023 research), and high-temperature degradation to chlorinated compounds
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 12 positive / 3 negative reports)
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 12 positive / 3 negative reports)

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where you encounter sucralose

  • Industrial Facilities — Manufacturing plants, Chemical storage areas, Waste treatment sites
  • Occupational Environments — Factories, Warehouses, Transportation vehicles
  • Food — processed food, beverages, candy, baked goods

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Sucralose:

  • Fragrance-free formulations
    Trade-offs: Consumer preference for scented products
    Relative cost: Lower (ingredient elimination)
  • Essential oil-based fragrances (with disclosure)
    Trade-offs: Natural does not mean safe — many essential oils are skin sensitizers
    Relative cost: 2-5× conventional

Frequently asked questions

What products contain sucralose?

Sucralose appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments); processed food (Food).

Why do regulators disagree about sucralose?

Sucralose has been classified by 3 agencies including IARC, EPA CTX / Genetox, EPA CTX / Genetox, with differing conclusions. Regulators apply different standards of evidence (animal data weighting, exposure-pattern assumptions, epidemiological power thresholds), which is why two scientific bodies can review the same data and reach different conclusions. See the regulatory consensus table on this page for the full picture.

See Sucralose in the food app

Look up products containing sucralose, compare to alternatives, and explore the full data record.

Open in food View raw API data

Sources (1)
  1. Sucralose E955 Splenda 600x Sucrose Chlorinated Disaccharide; Hough Phadnis 1976 Tate Lyle Discovery Insecticide Research Taste; FDA 1998 21 CFR 172.831 EFSA ADI 15 mg/kg/day; Sucralose-6-Acetate S6A Genotoxicity Ames Comet 2023 Schiffman; Gut Microbiome Disruption Lactobacillus Bifidobacterium; High-Temperature Degradation Chlorinated Furans Baking >180C; WWTP Resistant Persistent Micropollutant Environmental Tracer; Photodegradation Chlorinated Products Surface Water; WHO 2023 NSS No Weight Benefit; EFSA Re-Evaluation Ongoing 2024; IARC Not Evaluated (2020) — regulatory

Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →