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. 2022 Oct 28;31(Suppl 3):s238–s244. doi: 10.1136/tc-2022-057484

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© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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The total concentration of flavour chemicals in tobacco-flavoured refill fluids purchased between 2011 and 2019. The y-axis shows concentrations in mg/mL, and the x-axis is ordered by increasing concentrations from left to right within each year. Codes represent products as described in online supplemental table S1. While total concentrations ranged from 0 to 47 mg/mL, most tobacco-flavoured refill fluids had low total concentrations of flavour chemicals until 2019, when over 54% of the products analysed had concentrations >10 mg/mL.