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KMID : 0881720210360020172
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Journal of Food Hygiene and Safety
2021 Volume.36 No. 2 p.172 ~ p.179
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Comparison of Caffeine, Benzopyrene, and Hazardous Metals in Brewed Coffee Selling in Gwangju Metropolitan City
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Ryu Keun-Young
Gang Gyung-Ri
Park Hye-Min
Lee Jae-Rin
Choi Su-Yeon
Jo Eun-Hye
Cho Bae-Sik
Kim Jin-Hee
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Abstract
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In this study, we evaluated the content of caffeine, benzo[a]pyrene, lead, and cadmium in coffee drinkssold at coffee shops in Gwangju, Korea. A total of 114 coffee samples (100 Americano coffees and 14 cold-brew coffees)were purchased at each of 100 coffee shops including the large (12) and mid-sized (13) franchises and other types of localcoffee shops (75). It was confirmed that the single-serving sizes of coffee drinks were 175 to 460 mL (Americano 220 to460, cold-blew 175 to 400). The result of the analysis to content of caffeine in coffee drinks to be 0.25 to 1.49 mg/mL, whichis higher than the 0.15 mg/mL standard for ‘high caffeine content beverages’, and based on the single-serving volume, somecoffee drinks were found to exceed the recommended adult caffeine intake of 400 mg/day even if only two cups were consumed.
The detection of benzo[a]pyrene (B[a]P) was found to range from not detected (ND) to 55.35 ng/kg. However, thereis currently no standard for B[a]P content in coffee drinks, but it was found to be lower than that of special-purpose foods(1.0 μg/kg or less), which has the lowest standard among other food types in the food code. As for heavy metals, lead (Pb)and cadmium (Cd) were confirmed from ND to 29.00 μg/kg and ND to 12.0 μg/kg, respectively, although most samples hadno detectable levels. As a result of this study, caffeine content should be considered when ingesting coffee drinks. Moreover,labeling of caffeine content on coffee products is needed for the safety of consumers in the future.
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KEYWORD
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Caffeine, Benzo[a]pyrene, Heavy metals, Coffee, Cold-brew
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