Baby Safety / Compounds / Ascorbic acid (vitamin C; E300)

Is Ascorbic acid (vitamin C; E300) safe for babies and kids?

Moderate risk for kids

Infants are more vulnerable to Ascorbic acid (vitamin C; E300) 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 ascorbic acid (vitamin c; e300)?

The IUPAC name is (2R)-2-[(1S)-1,2-dihydroxyethyl]-3,4-dihydroxy-2H-furan-5-one.

Also known as: (2R)-2-[(1S)-1,2-dihydroxyethyl]-3,4-dihydroxy-2H-furan-5-one, l-ascorbic acid, ascorbic acid, vitamin C.

IUPAC name
(2R)-2-[(1S)-1,2-dihydroxyethyl]-3,4-dihydroxy-2H-furan-5-one
CAS number
50-81-7
Molecular formula
C6H8O6
Molecular weight
176.12 g/mol
SMILES
C(C(C1C(=C(C(=O)O1)O)O)O)O
PubChem CID
54670067

Risk for babies

Moderate risk

Infants are more vulnerable to Ascorbic acid (vitamin C; E300) 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 Ascorbic acid (vitamin C; E300), 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

3 regulatory and scientific bodies have classified Ascorbic acid (vitamin C; E300). The classifications differ — that's the data.

AgencyYearClassificationNotes
IARC2015Not evaluated by IARC for carcinogenicity — Ascorbic acid (E300; CAS 50-81-7; L-ascorbic acid; vitamin C; (R)-3,4-dihydroxy-5-((S)-1,2-dihydroxyethyl)furan-2(5H)-one) is FDA GRAS (21 CFR 182.3013 as an antioxidant; 21 CFR 182.5013 as a nutrient; 21 CFR 184.1033 as a GRAS substance) and EU E300; JECFA ADI 'not specified'; EFSA confirmed safety at current food use levels; no IARC, EPA, or EFSA carcinogenicity classification; ascorbic acid is an essential human micronutrient — humans (unlike most mammals) lack L-gulonolactone oxidase (GULO), the enzyme catalyzing the final step of ascorbic acid biosynthesis from glucose; consequently vitamin C must be obtained from diet; dietary deficiency causes scurvy; as a food additive, ascorbic acid serves multiple functions: antioxidant (preventing lipid and color oxidation in foods), flour improver/maturing agent (the fast-acting oxidant used in bread dough), nutrient supplement, and acidulant; ascorbic acid is the most important food antioxidant by volume of use globally
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 50 positive / 4 negative reports)
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 50 positive / 4 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 kids encounter ascorbic acid (vitamin c; e300)

  • Industrial Facilities — Manufacturing plants, Chemical storage areas, Waste treatment sites
  • Occupational Environments — Factories, Warehouses, Transportation vehicles
  • Consumer Products — dietary supplements, fortified foods, energy drinks

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Ascorbic acid (vitamin C; E300):

  • Physical/mechanical pest control (IPM)
    Trade-offs: More labor-intensive. May not be sufficient for severe infestations.
    Relative cost: 1.2-2×

Frequently asked questions

Is ascorbic acid (vitamin c; e300) safe for kids?

Infants are more vulnerable to Ascorbic acid (vitamin C; E300) 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 ascorbic acid (vitamin c; e300)?

Ascorbic acid (vitamin C; E300) appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments); dietary supplements (Consumer products).

What should I do if my child is exposed to ascorbic acid (vitamin c; e300)?

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.

Why do regulators disagree about ascorbic acid (vitamin c; e300)?

Ascorbic acid (vitamin C; E300) 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.

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Sources (1)
  1. Ascorbic Acid L-Ascorbic Acid Vitamin C CAS 50-81-7 C6H8O6 pKa1 4.17 E300 FDA GRAS 21 CFR 182.3013 184.1033; EFSA ADI Not Specified; Essential Nutrient GULO Deficiency Humans No Endogenous Synthesis; Prolyl Lysyl Hydroxylase Collagen Scurvy; Dopamine Beta-Hydroxylase Norepinephrine; Carnitine PHM Peptide Amidation; Vitamin E Tocopheroxyl Radical Regeneration; Flour Improver: Ascorbic Acid Oxidase Dehydroascorbic Acid GS-H Oxidation Disulfide Strong Gluten Paradox; No Toxic By-Products Preferred EU vs Bromate ADA; Nitrite Cured Meat N-Nitrosamine Reduction E301 Sodium Ascorbate; Reichstein Synthesis 1933 Two-Step Fermentation China 80% 120000 Tonnes; RDA 75-90 mg/day UL 2000 mg/day; Oxalate High Dose >1000 mg Kidney Stone Risk; Pauling Megadose No RCT Cancer Benefit; IV High-Dose Pro-Oxidant Oncology Research (2015) — 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 →