E-Liquid Flavor Classifications in Literature

E-liquids can be found in a high selection of flavors. A systematic classification of e-liquid flavors is necessary to enhance comparability of study effects. From the foodstuff, alcohol, and fragrance industry, flavors are categorized applying taste wheels. We systematically reviewed literature on flavors linked to Digital cigarette use, to investigate how e-liquid flavors are already categorized in exploration, and suggest an e-liquid flavor wheel to classify e-liquids based on internet marketing descriptions.MethodsThe research was done in Could 2017 utilizing PubMed and Embase databases. Keywords bundled conditions associated with Digital cigarette, flavors, liking, Understanding, and seeking in articles or blog posts. Results had been independently screened and reviewed. Flavor groups Employed in the posts reviewed ended up extracted.ResultsSearches yielded 386 exceptional content of which 28 had been provided. Forty-a few key taste categories ended up documented in these article content (eg, tobacco, menthol, mint, fruit, bakery/dessert, Alcoholic beverages, nuts, spice, sweet, espresso/tea, beverages, chocolate, sweet flavors, vanilla, and unflavored). Flavor classifications of e-liquids in literature showed similarities and variances across scientific studies. Our proposed e-liquid taste wheel is made up of 13 key classes and ninety subcategories, which summarize flavor groups from literature to find a shared vocabulary. For classification of e-liquids employing our flavor wheel, marketing and advertising descriptions needs to be utilised.


We now have proposed a flavor wheel for classification of e-liquids. Additional analysis is required to check the flavor wheels’ empirical price. Persistently classifying e-liquid flavors employing our taste wheel in study (eg, experimental, promoting, or qualitative research) minimizes interpretation distinctions and will increase comparability of results.ImplicationsWe reviewed e-liquid flavors and taste groups Employed in research. A large variation from the naming of taste groups was uncovered and e-liquid flavors were not constantly categorised. We designed an e-liquid flavor wheel and offered a guideline for systematic classification of e-liquids based upon marketing and advertising descriptions. Our flavor wheel summarizes e-liquid flavors and groups Utilized in literature so as to create a shared vocabulary. Implementing our taste wheel in study on e-liquids will strengthen details interpretation, boost comparability across reports, and assistance plan makers in developing procedures for regulation of e-liquid flavors.


Digital cigarettes (e-cigarettes) vaporize e-liquids, which consist of a propylene glycol and glycerol foundation, and a various amount of nicotine and flavorings.1 Flavorings would be the taste molecules existing in e-liquids that add to the perceived taste, Whilst we check with flavors because the blended sensations of flavor and odor of e-liquids from a specific brand name. The volume of offered e-liquid flavors exceeded 7500 in 2014 and remains raising.two These flavors boost sensory attraction of your e-liquid.three Expanding attractiveness of e-liquid flavors could encourage smokers to implement an e-cigarette as choice for normal cigarettes, as nontobacco and nonmenthol flavors are linked to larger charges of smoking cessation.4–six Conversely, it can be well set up that flavors in tobacco goods frequently entice adolescents and youth.seven–10 Taste Choices may play a significant position in e-cigarette use amid adolescents.11 Primarily nontobacco e-liquid flavors are attractive to nonsmoking youth, thereby stimulating use and nicotine consumption.twelve–14

Nicotine-containing e-liquids Possess a stimulating impact on the reward technique throughout the brain, which is implicated in the event of addiction.fifteen The core psychological parts of reward are liking, Understanding, and seeking.16 Whereas flavors are extra to enhance merchandise liking, addictive substances for example nicotine Engage in a job in commitment and influence the reward technique via mechanisms of Understanding and wanting. Considering current literature, research has mostly centered on the part of flavors in liking of e-cigarettes, supplying Perception in e-cigarette use and Tastes. As an example, an assessment of Huang et al.17 showed that most e-cigarette buyers want nontraditional flavors for instance fruit and sweet flavors when compared to conventional flavors for example tobacco or menthol. Additionally, a new usa ejuice examine showed that adolescents predominantly favor fruit, sweet/dessert, and vanilla, Whilst probably the most chosen flavors among Grownups are nonsweet e-cigarette flavors for instance fruit, tobacco, and menthol/mint.eleven For regulation uses, it is important to know how flavor liking differs amongst different purchaser groups, by way of example, Grownup tobacco smokers and nonsmoking adolescents or youth. Even so, as The variability of accessible e-liquid flavors boosts and Progressively more analysis is getting executed, a systematic technique for flavor classification is necessary to be able to extend comparability of benefits and aid knowledge interpretation between scientists and coverage makers.

Taste wheels are created like a Instrument to constantly classify flavors and/or aromas while in the food, Liquor, and fragrance industries. A taste wheel visually represents a shared vocabulary of taste characteristics that happen to be categorized into standard classes. By way of example, Noble et al.18 developed a wine aroma wheel in 1984 that contains twelve primary categories for instance fruity, vegetative, nutty, earthy, chemical, floral, and spicy, and makes use of subattributes for specification. Equally, flavor wheels have also been designed for other alcoholic beverages (eg, beer and whiskey),19,twenty for foods items (eg, chocolate, coffee, olive oil, and cheese),21–24 and for fragrances.twenty five Concerning tobacco products, the industry has created a cigar taste wheel that consists of 8 most important categories and fifty two subcategories.26 These flavor wheels are used as a typical vocabulary inside of industries and science, By way of example, to be a Software utilized by customer or qualified panels to assess taste attributes.While the quantity of distinctive e-cigarette flavors is growing, no flavor wheel for e-liquids currently exists. We have reviewed e-liquid taste classification in existing literature and propose a flavor wheel to systematically classify e-liquid flavors.