A story about how one analysis turned a symbol of hospitality into a slow-acting chemical bomb.
☕ In 2003, Serbian chemist Vladimir Jovanović from the University of Belgrade decided to test what no one had tested before: what exactly happens to coffee when it's brewed the Balkan way — brought to a boil three times in a cezve, removed from heat, then put back on. This method, inherited from Ottoman times, was considered a sacred ritual: guests received a drink with thick foam, housewives passed recipes down to their daughters, and the brewing process itself became a meditation. Jovanović discovered that this meditation produced 3-5 times more acrylamide than any Western coffee preparation method — from filter to espresso machines. Acrylamide is an organic compound formed when starch-containing products are heated above 120°C, classified by the International Agency for Research on Cancer (IARC) as a Group 2A carcinogen — "probably carcinogenic to humans."
🔬 The results, published in European Food Research and Technology in 2004, proved devastating for the cultural narrative: the drink that the Balkans had positioned against "Western instant counterfeit" turned out to be chemically more dangerous than the industrial product. The repeated boiling, considered a mark of quality and attention to guests, triggered the Maillard reaction chain — non-enzymatic browning, where the amino acid asparagine reacts with reducing sugars to form acrylamide. The longer the coffee boiled, the more heating cycles it went through, the higher the toxin concentration became. The Balkan gesture of hospitality turned into biochemical roulette.
⚗️ Research by Michalak et al., published in Proceedings of the Nutrition Society in 2020, dotted all the i's: Turkish coffee contained 4.10 μg of acrylamide per 100 ml of beverage — versus 3.19 μg/100 ml for French press, 2.95 μg/100 ml for filter coffee, and 2.13 μg/100 ml for espresso. The difference wasn't explained by bean quality or roast level, but by the physics of the process: with the Turkish method, water contacted ground coffee at boiling temperature significantly longer than in any other method. An espresso machine pushed water through under pressure in 25-30 seconds at 90-95°C, filter coffee brewed for 4-5 minutes at below-boiling temperature. The cezve, however, boiled at least three times, each cycle lasting 2-3 minutes at 100°C and above.
📊 Acrylamide extraction with the Turkish method reached 95% — almost complete migration of the toxin from ground beans into liquid. For espresso this figure stopped at 52%: short contact and lower temperature didn't allow acrylamide to fully transfer into solution. Turkish coffee worked like a chemical extractor, squeezing out not only aromatic oils and caffeine from the beans, but also carcinogen. The concentration of TDS (Total Dissolved Solids) directly correlated with acrylamide levels: the denser the beverage, the more potentially dangerous molecules it contained.
🧪 The problem was compounded by the coffee-to-water ratio. The Balkan method required 7-10 grams of ground coffee per 100 ml of water — versus 5-6 grams for filter and 7 grams per 30 ml for espresso (but there the finished beverage volume was many times smaller). High powder concentration during prolonged boiling turned the cezve into a bioreactor: each additional minute on heat increased acrylamide yield. Research by MDPI, published in 2023, confirmed that acrylamide doesn't break down during boiling — on the contrary, high temperatures stimulate its formation, especially in the presence of oxygen and at low coffee powder moisture.
🔥 The Maillard reaction — the very one responsible for bread's golden crust and roasted meat aroma — turned into a curse with repeated heating. Asparagine, contained in coffee beans, reacted with fructose and glucose at temperatures above 120°C, forming acrylamide. During the first boil the process only began, during the second it accelerated, during the third it reached maximum. The Balkan tradition of "three foams" turned out to be a threefold amplification of chemical threat.
💥 Publication of Jovanović's discovery in 2004 caused an explosion in Serbia, Bosnia and Herzegovina, Greece — countries where cezve coffee was not just a beverage, but a national code. Serbian media wrote about a "Western conspiracy against Balkan traditions," Greek coffee shops refused to acknowledge the research results, and Bosnian housewives continued brewing coffee the way their grandmothers taught them. Jovanović received threatening letters: he was accused of cultural betrayal, of trying to impose "American lifestyle with capsule machines." The Balkans perceived scientific fact as cultural aggression.
🏛️ Serbia's Ministry of Health tried to soften the blow: issued recommendations to brew coffee "no more than twice," lower the temperature, use less powder per serving. But the recommendations hit an iron wall of tradition: how do you explain to a grandmother from Niš that her coffee brewing method, passed down through generations since the 17th century, is dangerous? How do you convince a Bosnian that the ritual of preparing "bosanska kafa" with three foams is not hospitality, but toxicology? Greek kafeneia — traditional coffee houses where men spent hours over a cup of Greek coffee (the same Turkish, but with a different name after Greek-Turkish conflicts) — ignored the warnings. For them coffee was a form of social connection, not a chemical experiment.
⚖️ The scientific community split. Some researchers pointed out that acrylamide levels in coffee are still lower than in French fries or chips (there concentration could reach 150-4000 μg/kg versus 40-100 μg/kg in coffee). Others reminded that chronic consumption of even small doses of carcinogen increases risk: Balkan people drank Turkish coffee 3-5 times a day, for years and decades. The European Food Safety Authority (EFSA) ultimately stated that acrylamide poses a risk to all age groups, but didn't single out specific coffee brewing methods as critical.
🏭 Western coffee producers perceived Jovanović's discovery as a gift: now they could position capsule machines and automatic coffee makers not just as convenience, but as a safer alternative. Nespresso and Dolce Gusto launched advertising campaigns emphasizing "controlled extraction temperature" and "minimal water-coffee contact time." Capsule systems operated at 85-92°C and completed preparation in 20-40 seconds — conditions under which acrylamide formation was minimal.
☕ Home espresso machine manufacturers — DeLonghi, Saeco, Gaggia — began indicating in specifications not only pressure and power, but also "low acrylamide level in finished beverage." This was a quiet revolution: chemical safety became a marketing advantage. The Balkan method, for centuries considered the quality standard, found itself on the sidelines of progress.
🔬 In parallel, research started on reducing acrylamide in coffee beans already at the roasting stage. It turned out that lighter roasting at 200-210°C instead of traditional dark roasting at 220-230°C reduced acrylamide content in beans by 30-40%. Some roasters began experimenting with adding asparaginase — an enzyme that breaks down asparagine before the Maillard reaction, but the method didn't gain wide adoption due to cost and changes to the flavor profile.
📌 In 2025-2026 the Balkan coffee brewing method is still alive, but changed. In Serbia, Bosnia, and Greece "conscious coffee shops" appeared, where the cezve is heated only once until the first foam appears, then removed from heat and allowed to steep for 2-3 minutes without re-boiling. This compromise reduces acrylamide levels to 2.5-3.0 μg/100 ml — close to filter coffee indicators, but preserves the traditional beverage texture. Greek startups like Athens Coffee Lab developed ceramic cezves with built-in thermometers, allowing temperature control and avoiding overheating above 95°C.
🌍 The European Commission in 2023 introduced voluntary standards for coffee producers, recommending package labeling indicate "brewing method with lowest acrylamide content." Several Balkan roasters — Belgrade Roasters, Sarajevo Coffee Company — began marking their products as "low-acrylamide roast," using light roasting and recommending single boiling. Sales of such beans are 25% above the regional average, but traditionalists still buy dark roast and brew coffee "the proper way" — three times, with three foams, despite everything. Cultural memory proved stronger than chemistry.