Baby Safety / Compounds / Thaumatin (E957)

Is Thaumatin (E957) safe for babies and kids?

Moderate risk for kids

Infants are more vulnerable to Thaumatin (E957) than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

What is thaumatin (e957)?

Also known as: Thaumatin, Thaumatins.

CAS number
53850-34-3

Risk for babies

Moderate risk

Infants are more vulnerable to Thaumatin (E957) than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

Neonates and infants up to 12 months have incomplete blood-brain barrier development, immature Phase I/II metabolic enzymes (particularly CYP3A4, UGT1A1), and higher gastrointestinal permeability. Equivalent doses produce higher internal concentrations and longer residence times.

What to do: Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

Risk for pregnant and nursing people

Context-dependent

Pregnancy alters the metabolism and distribution of Thaumatin (E957), potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.

No specific reproductive toxicity data identified, but pregnancy-specific safety data is limited for most chemicals. Precautionary minimization of exposure is recommended.

What to do: Minimize exposure during pregnancy and lactation. Consult healthcare provider regarding specific risks. Consider alternative products with lower hazard profiles.

Regulatory consensus

1 regulatory bodyhas classified Thaumatin (E957).

AgencyYearClassificationNotes
IARC2009Not evaluated by IARC for carcinogenicity — Thaumatin (E957; CAS 53850-34-3; a mixture of intensely sweet proteins, predominantly thaumatin I and thaumatin II, isolated from the arils of Thaumatococcus daniellii — the katemfe fruit of West and Central Africa) is FDA GRAS (GRAS Notice No. GRN 000095, 2002) and EU E957; JECFA ADI 'not specified' (JECFA 1985, 1989); EFSA opinion 2009 confirmed no safety concern at current use levels (EFSA Journal 2009;7(8):1218); no IARC, EPA, or EFSA carcinogenicity classification; thaumatin is a protein sweetener — approximately 2,000–3,000× sweeter than sucrose on a weight basis (the highest sweetness potency among naturally derived protein sweeteners); because it is a protein of ~207 amino acids (MW ~22 kDa), it is hydrolyzed to amino acids upon digestion — raising no toxicological concerns unique to a synthetic chemical; it is not technically used primarily as a sweetener in most food applications but rather as a flavor modifier and sweetness enhancer (taste threshold: ~50 nM — extremely low for a protein); its role in food is primarily to modify and round bitterness and astringency and to enhance fruit/menthol/mint flavors

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 kids encounter thaumatin (e957)

  • Industrial Facilities — Manufacturing plants, Chemical storage areas, Waste treatment sites
  • Occupational Environments — Factories, Warehouses, Transportation vehicles

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Thaumatin (E957):

  • 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

Is thaumatin (e957) safe for kids?

Infants are more vulnerable to Thaumatin (E957) than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

What products contain thaumatin (e957)?

Thaumatin (E957) appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments).

What should I do if my child is exposed to thaumatin (e957)?

Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

See Thaumatin (E957) in the baby app

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Sources (1)
  1. Thaumatin CAS 53850-34-3 PR-5 Protein Thaumatin I II 207 AA 22 kDa 8 Disulfide Bonds 2000-3000x Sucrose; FDA GRAS GRN 000095 2002; EU E957; JECFA ADI Not Specified 1985 1989; EFSA 2009 EFSA Journal 7(8):1218 No Safety Concern; Thaumatococcus daniellii Katemfe West Africa Nigeria Ghana; T1R3 CRD Binding vs Small Molecule VFD Distinct Mechanism Slow Onset Lingering Sweetness; Flavor Modifier Bitterness Reduction Caffeine Quinine Naringin; Mint Menthol Fruit Enhancement Chewing Gum 1-2 ppm; Recombinant Aspergillus Niger Kluyveromyces Lactis Production; Protein Digested Amino Acids No Systemic Toxicology; Allergenicity Theoretical Rare Clinical Reports; Talin Food Company UK Commercial Extraction; mGluR5 Agonism Umami Modulation (2009) — 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 →