10.1136/tobaccocontrol-2014-051670 Summary Keywords reduced risk products, flavor ingredients, structural grouping, in silico toxicology, E-vapor products, ENDS Citation Sciuscio D, Calvino-Martin F, Kumar A, Langston TB, Martin E, Marescotti D, Mathis C, Hoeng J, Peitsch MC, Smith DC, Gogova M, Vanscheeuwijck P and Lee KM (2022) Toxicological Assessment of Flavor Ingredients in E-Vapor Products
They say the contamination led to cancer and other harmful side effects
I have reviews for all of the XMAX / POTV products and include more comparisons below
Minor tobacco alkaloids as biomarkers for tobacco use: Comparison of users of cigarettes, smokeless tobacco, cigars, and pipes
Horse racing license fees and taxes are levied on the amounts wagered at horse racing meets