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. 2023 Jul 23;97(9):2343–2356. doi: 10.1007/s00204-023-03554-9

Fig. 1.

Fig. 1

Metabolic activity measured after a 24-h exposure period of human gingival fibroblasts (HGF-1) to a–e nicotine pouch extracts, f reference snus CRP1.1 and g nicotine control in dissolution medium. Nicotine concentrations of sample extracts are represented through the dotted line, plotted against the secondary Y-axis. Results are presented as mean of triplicates and standard deviation. *p < 0.05, **p < 0.01, ***p < .0.001