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. 2022 Jan 5;32(e1):e78–e82. doi: 10.1136/tobaccocontrol-2021-056952

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© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Percentage distribution of flavour wheel categories by nicotine class: absent, nicotine absent; free-base, free-base nicotine. NAIC, nicotine–organic acid ingredient combination; NSI, nicotine salt ingredient.