Acrylamide is a chemical that forms naturally in starchy foods during high-temperature cooking — frying, roasting, baking, or toasting. It was first detected in food in 2002 and has since become one of the most studied dietary contaminants. It is not added deliberately; it is a reaction product of the amino acid asparagine with reducing sugars when temperatures exceed approximately 120 °C.
Where it's found
Acrylamide forms in a wide range of everyday foods: crisps, French fries, bread, toast, biscuits, crackers, breakfast cereals, coffee (from roasting), and dark-roasted vegetables. The darker and crispier the cooked surface, the higher the acrylamide concentration. Baby foods and infant biscuits can contain significant amounts. It is also found in cigarette smoke and some industrial products such as grout, adhesives, and water treatment agents.
Routes of exposure
Dietary exposure is the primary route for non-smokers, accounting for the vast majority of intake. A significant additional dose comes from cigarette smoke — smokers can have acrylamide blood levels three to four times higher than non-smokers. Occupational inhalation and skin absorption occur in industries using acrylamide monomer (paper manufacture, mining, water treatment). Drinking water treated with polyacrylamide flocculants may contain trace residual monomer.
Health concerns
Acrylamide is classified as a probable human carcinogen (Group 2A) by the IARC, based on strong animal evidence and plausible mechanisms. In rodents at high doses it causes nerve damage (peripheral neuropathy), reproductive toxicity, and multiple tumour types. In humans, large epidemiological studies have found associations with endometrial, ovarian, and kidney cancers, though results are not fully consistent. Acrylamide is also a genotoxin — it forms adducts with DNA — raising concern about no-threshold dose–response at any level of exposure.
Evidence
IARC Group 2A classification is based on sufficient animal evidence and strong mechanistic data. Human epidemiology shows consistent associations with hormone-sensitive cancers. The EFSA concluded in 2015 that acrylamide in food is a public health concern and that the margin of exposure for cancer is not sufficient to be reassuring. All major regulatory bodies agree exposure should be reduced.
Who's most at risk
Children and infants are disproportionately exposed relative to body weight due to higher food intake per kilogram and consumption of acrylamide-rich foods such as biscuits, crisps, and breakfast cereals. Smokers carry a substantially higher burden. People who rely heavily on fried or heavily roasted foods as dietary staples face the greatest dietary exposure.
Regulatory status
RegulationThe EU introduced benchmark levels for acrylamide in food in 2017 (Regulation EU 2017/2158), requiring food businesses to monitor levels and apply mitigation measures. The UK retained these rules post-Brexit. The FDA in the US has issued guidance for the food industry on reducing acrylamide. There is no legal maximum residue level (MRL) for acrylamide in food — benchmark levels are performance targets, not absolute limits.
How to reduce your exposure
Cook starches to a golden yellow rather than a dark brown or black. Toast bread lightly. Store potatoes in a cool, dark place (not the fridge — cold storage increases sugar content and acrylamide formation on cooking). Boiling or steaming starchy foods produces no acrylamide. Choose lighter-roast coffee. Avoid heavily charred or burnt foods. Varying cooking methods and not over-relying on fried foods meaningfully reduces cumulative dietary exposure.
The nutrition connection
The same high-temperature cooking that creates acrylamide also destroys many heat-sensitive nutrients — B vitamins, vitamin C, and beneficial plant compounds. A diet naturally lower in acrylamide tends to be one richer in gently cooked vegetables, whole grains prepared by boiling or steaming, and minimally processed foods. Increasing dietary fibre and antioxidants from fruits and vegetables may support the body's ability to handle low-level carcinogen exposure through DNA repair mechanisms and phase II detoxification enzymes.