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. 2026 Aug 13;13:1927483. doi: 10.3389/fnut.2026.1927483

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Copyright © 2026 Huang, Wu, Qu, Liu, Feng, Ren, Yang, Xu and Fan.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Four line charts compare corrected detection rates versus log concentration for furfural, styrene, 4-ethylphenol, and 3-hydroxy-2-butanone. Each chart displays blue data points, fitted curves, detection thresholds, and correlation coefficients, showing sigmoidal relationships. — Sigmoidal olfactory threshold curves for minor characteristic typical odorants.