Benzo[a]pyrene: a smoke-formed contaminant in grilled and smoked meat, regulated as a marker for cancer-causing PAHs

The smell of a backyard barbecue or a smoked brisket is part of summer for many families, and benzo[a]pyrene comes along with that smoke. It forms when fat drips onto flames and the smoke settles back on the meat, and it is also found in cigarette smoke and car exhaust. The concern is not about how you feel after one cookout but a slow, long-term one, because some compounds in this family can damage DNA and cause cancer, even though studies in people have not proven that grilled or smoked meat at normal intakes does so. Small changes at the grill, rather than giving it up, are what the evidence points to.

Everyday exposure: where you meet it and how much

Benzo[a]pyrene is one of the polycyclic aromatic hydrocarbons (PAHs), compounds formed mainly by incomplete combustion or heat-induced breakdown of organic matter. [2] When fat and juices from meat grilled over a heated surface or open fire drip onto the fire, flames and smoke form, and PAHs in the smoke stick to the meat. PAHs also form when meats are smoked. [1] They are found in other smoked foods, cigarette smoke and car exhaust. [1]

Food is a major route of exposure. EFSA notes PAHs in cereals, vegetable oils, coffee and home-cooked foods, usually where smoking, heating or drying is involved; grilling, roasting and smoking, particularly charcoal grilling and barbecuing, can lead to high concentrations. [2] In EU data, benzo[a]pyrene was present in about half of all food samples analysed. [2]

Known and suspected harms

Evidence labels are editorial summaries, not individual risk predictions: established means recognized under the stated conditions; probable means a likely contribution with uncertainty; possible means limited evidence; disputed means assessors disagree. These labels do not describe how common an effect is.

• Established — some PAHs are genotoxic and can cause cancer: EFSA states that a number of PAHs are genotoxic and can cause cancer. [2] In laboratory experiments PAHs change DNA, and rodents fed PAHs developed cancers including leukemia and tumours of the gastrointestinal tract and lungs, at doses thousands of times higher than a normal diet. [1]
• Established — charcoal grilling and smoking raise levels in food: EFSA identifies charcoal-grilled and barbecued foods as able to reach high concentrations. [2] EU law accepts that some traditionally smoked meats cannot meet the general limits without changing the product, and allows higher levels for local sale in certain member states. [3]
• Possible — cancer risk from PAHs in cooked meat at normal intakes: population studies have not established a definitive link between PAH exposure from cooked meats and cancer in humans. [1]

Reducing avoidable exposure and harm

EFSA notes that when barbecuing, exposure can be reduced by preventing fat from dripping into the flames. [2] The US National Cancer Institute suggests avoiding direct exposure of meat to an open flame or hot metal surface, avoiding long cooking at high temperatures, and removing charred portions. [1]

What it is

Benzo[a]pyrene (CAS 50-32-8) is a five-ring polycyclic aromatic hydrocarbon. [5] It has been used as an indicator for PAHs in food. In 2008 EFSA's contaminants panel concluded that benzo[a]pyrene alone is not a sufficient indicator, because other carcinogenic PAHs were found in about 30% of samples that tested negative for it. The panel recommended the sum of four PAHs (PAH4: benzo[a]pyrene, benz[a]anthracene, benzo[b]fluoranthene and chrysene) as a better indicator. [2]

What it does and why it is used

Benzo[a]pyrene is not added to food; it is a contaminant from smoke, heat and environmental sources. [1,2]

Regulatory status and health context

Canada

Health Canada's list of maximum levels includes PAHs in only one food: 3 µg/kg benzo[a]pyrene toxic equivalents in olive-pomace oil. We did not find a Canadian limit for PAHs in meat. [4]

United States

There are no federal guidelines on eating foods that contain HCAs and PAHs. [1]

European Union

Regulation (EU) 2023/915 sets maximum levels for smoked meat and smoked meat products of 2.0 µg/kg for benzo[a]pyrene and 12.0 µg/kg for the sum of PAH4. Certain member states may allow traditionally smoked meat produced and sold locally with up to 5.0 µg/kg benzo[a]pyrene and 30.0 µg/kg PAH4. [3]

Environmental notes

PAHs form from incomplete combustion and reach food from environmental sources as well as processing and cooking; EFSA also notes seafood from polluted waters as a source. [2]

Quick facts

• CAS: 50-32-8. [5]
• Found in: charcoal-grilled, barbecued and smoked foods, among others. [1,2]
• EU limit, smoked meat: 2.0 µg/kg benzo[a]pyrene; 12.0 µg/kg PAH4. [3]
• Indicator: EU limits use benzo[a]pyrene and the PAH4 sum. [2,3]
• Simple habit: keep fat from dripping into flames, and trim charred bits. [1,2]

Sources

All URLs were fetched on 2026-11-11. Source publication dates differ from this draft's review date.

1. US National Cancer Institute: Chemicals in meat cooked at high temperatures and cancer risk.
2. EFSA: Opinion on suitable indicators for the occurrence and toxicity of polycyclic aromatic hydrocarbons in food.
3. EUR-Lex: Commission Regulation (EU) 2023/915 on maximum levels for certain contaminants in food.
4. Health Canada: Maximum levels for chemical contaminants in foods.
5. PubChem PUG REST: benzo[a]pyrene synonyms.