Salicylic acid in food: ingestion safety
Low risk(People-specific data is limited; this page draws from human adult context.) Salicylic acid (2-hydroxybenzoic acid; C₇H₆O₃) is a naturally occurring plant hormone (phytohormone) and beta-hydroxy acid (BHA) with keratolytic, anti-inflammatory, and antimicrobial properties; it is the active metabolite of aspirin (acetylsalicylic acid, hydrolyzed in vivo to salicylate) and is found naturally in willow bark (Salix spp.), wintergreen (Gaultheria procumbens), and many fruits and vegetables. Pharmacological properties: salicylic acid softens and removes the protein linkages that hold together corneum cells (keratolysis), making it effective for treating acne (0.5–2%), psoriasis, warts (5–40%), calluses (15–40%), seborrheic dermatitis, and dandruff (1–3% in shampoos). Regulatory status: FDA OTC monograph ingredient for acne (0.5–2%), wart/callus removal (up to 40%), and dandruff/seborrheic dermatitis (1.8–3%). Aspirin relationship: acetylsalicylic acid (aspirin) is rapidly hydrolyzed after oral ingestion → salicylate + acetate; salicylate at therapeutic serum concentrations (1.5–3 mg/dL) provides anti-inflammatory effects; salicylism (tinnitus, dizziness, nausea) occurs above 3 mg/dL. Oral dosing: salicylic acid itself is poorly tolerated orally (GI irritant) — aspirin's acetyl ester form is better tolerated. Topical safety: at concentrations up to 2% for routine skin application, salicylic acid is well-tolerated in adults; higher concentrations for wart treatment require localized application. Reye's syndrome: salicylates (including salicylic acid) are contraindicated in children under 12 with viral illnesses — risk of Reye's syndrome (hepatic encephalopathy).
What is salicylic acid?
The IUPAC name is 2-hydroxybenzoic acid.
Also known as: 2-hydroxybenzoic acid, o-hydroxybenzoic acid, 2-Carboxyphenol, o-Carboxyphenol.
- IUPAC name
- 2-hydroxybenzoic acid
- CAS number
- 69-72-7
- Molecular formula
- C7H6O3
- Molecular weight
- 138.12 g/mol
- SMILES
- C1=CC=C(C(=C1)C(=O)O)O
- PubChem CID
- 338
Risk for people
Low riskSalicylic acid (2-hydroxybenzoic acid; C₇H₆O₃) is a naturally occurring plant hormone (phytohormone) and beta-hydroxy acid (BHA) with keratolytic, anti-inflammatory, and antimicrobial properties; it is the active metabolite of aspirin (acetylsalicylic acid, hydrolyzed in vivo to salicylate) and is found naturally in willow bark (Salix spp.), wintergreen (Gaultheria procumbens), and many fruits and vegetables. Pharmacological properties: salicylic acid softens and removes the protein linkages that hold together corneum cells (keratolysis), making it effective for treating acne (0.5–2%), psoriasis, warts (5–40%), calluses (15–40%), seborrheic dermatitis, and dandruff (1–3% in shampoos). Regulatory status: FDA OTC monograph ingredient for acne (0.5–2%), wart/callus removal (up to 40%), and dandruff/seborrheic dermatitis (1.8–3%). Aspirin relationship: acetylsalicylic acid (aspirin) is rapidly hydrolyzed after oral ingestion → salicylate + acetate; salicylate at therapeutic serum concentrations (1.5–3 mg/dL) provides anti-inflammatory effects; salicylism (tinnitus, dizziness, nausea) occurs above 3 mg/dL. Oral dosing: salicylic acid itself is poorly tolerated orally (GI irritant) — aspirin's acetyl ester form is better tolerated. Topical safety: at concentrations up to 2% for routine skin application, salicylic acid is well-tolerated in adults; higher concentrations for wart treatment require localized application. Reye's syndrome: salicylates (including salicylic acid) are contraindicated in children under 12 with viral illnesses — risk of Reye's syndrome (hepatic encephalopathy).
Regulatory consensus
2 regulatory and scientific bodies have classified Salicylic acid. The classifications differ — that's the data.
| Agency | Year | Classification | Notes |
|---|---|---|---|
| EPA CTX / Genetox | — | Genotoxicity: positive (Ames: positive, 2 positive / 7 negative reports) | |
| EPA CTX / Genetox | — | Genotoxicity: positive (Ames: positive, 2 positive / 7 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 salicylic acid
- 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 Salicylic acid:
-
Fragrance-free formulations
Trade-offs: Consumer preference for scented productsRelative cost: Lower (ingredient elimination)
-
Essential oil-based fragrances (with disclosure)
Trade-offs: Natural does not mean safe — many essential oils are skin sensitizersRelative cost: 2-5× conventional
Frequently asked questions
What products contain salicylic acid?
Salicylic acid appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments); processed food (Food).
See Salicylic acid in the food app
Look up products containing salicylic acid, compare to alternatives, and explore the full data record.
Open in food View raw API dataSources (2)
- FDA OTC Monograph: Salicylic Acid — acne (0.5–2%); wart removal (up to 40%); dandruff (1.8–3%); Reye's syndrome warning; systemic absorption from large-area application; methyl salicylate poisoning (2019) (2019) — regulatory
- NIOSH: Salicylic Acid — keratolytic mechanism; dermal absorption ~25%; salicylism at high serum levels; topical analgesic products; aspirin relationship; pediatric precautions (2019) (2019) — 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 →