Food & Drink / Compounds / Theobromine

Theobromine in food: ingestion safety

Context-dependent

Risk is species-specific and dose-dependent. Dogs at highest risk.

What is theobromine?

Theobromine is a alkaloid, methylxanthine, stimulant.

The IUPAC name is 3,7-dimethyl-1H-purine-2,6-dione.

Also known as: 3,7-dimethyl-1H-purine-2,6-dione, 3,7-dimethylxanthine, chocolate alkaloid, Diurobromine.

IUPAC name
3,7-dimethyl-1H-purine-2,6-dione
CAS number
83-67-0
Molecular formula
C7H8N4O2
Molecular weight
180.16 g/mol
SMILES
CN1C=NC2=C1C(=O)NC(=O)N2C
PubChem CID
5429

Risk for people

Context-dependent

Risk is species-specific and dose-dependent. Dogs at highest risk.

Toxicity depends on: (1) chocolate type (baking > dark > milk > white), (2) amount consumed, (3) animal's body weight, (4) species (dogs slower metabolism than humans). Even small amounts of baking chocolate can be dangerous for small dogs.

What to do: Species-dependent - see context-specific guidance above.

Regulatory consensus

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

AgencyYearClassificationNotes
FDA2020Naturally occurring in cocoa - GRAS at levels found in chocolate productsSafe for humans at dietary exposure levels
EPA CTX / IARC—Group 3 - Not classifiable as to its carcinogenicity to humans
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 25 positive / 7 negative reports)
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 25 positive / 7 negative reports)
EPA CTX / Skin-Eye—skin sensitisation: in vivo (LLNA): Not likely to be sensitizing (score: low)

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 theobromine

  • Baking Chocolate — Unsweetened baking chocolate, 100% cocoa
    HIGHEST RISK - most concentrated theobromine
  • Dark Chocolate — 70-85% cacao dark chocolate
    HIGH RISK - significant theobromine content
  • Semi Sweet Chocolate — Chocolate chips, semi-sweet baking bars
    MODERATE RISK
  • Milk Chocolate — Hershey's, Cadbury, most candy bars
    LOWER RISK but still dangerous in large amounts or for small dogs
  • White Chocolate — White chocolate bars, white baking chips
    MINIMAL RISK - negligible theobromine (primary concern is fat/sugar content)
  • Cocoa Powder — Unsweetened cocoa powder, hot chocolate mix
    HIGH RISK if dry powder consumed
  • Food — processed food, beverages, candy, baked goods

Safer alternatives

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

  • Carob (for dog treats) — Safe chocolate substitute for dogs - no theobromine
    Trade-offs: Different flavor, less appealing to some dogs
    Relative cost: 1.2-2×

Frequently asked questions

Is theobromine safe for you?

Risk is species-specific and dose-dependent. Dogs at highest risk.

What products contain theobromine?

Theobromine appears in: Unsweetened baking chocolate (baking chocolate); 100% cocoa (baking chocolate); 70-85% cacao dark chocolate (dark chocolate); Chocolate chips (semi sweet chocolate); semi-sweet baking bars (semi sweet chocolate).

What should I do if my you is exposed to theobromine?

Species-dependent - see context-specific guidance above.

Why do regulators disagree about theobromine?

Theobromine has been classified by 5 agencies including FDA, EPA CTX / IARC, EPA CTX / Genetox, EPA CTX / Genetox, EPA CTX / Skin-Eye, 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 Theobromine in the food app

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

Open in food View raw API data

Sources (4)
  1. FDA - Theobromine in Food (2020) — fda
  2. Theobromine - PubChem Compound Summary — pubchem
  3. ASPCA Animal Poison Control - Chocolate Toxicity — vet
  4. Chocolate Poisoning in Dogs (2003) — vet

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 →