Regarding the impact of smoking on the OE, we previously reported that CS impaired the OE and olfaction by reducing the olfactory progenitor cells and mature ORNs (Ueha et al., 2016a) and that CS delayed regeneration of the OE (Ueha et al., 2016b)
[25] [39] however, non-medical amphetamine use is prohibited at sporting events that are regulated by collegiate, national, and international anti-doping agencies
They had known for decades that there were carcinogens in their product
Sometimes it is sad to note that RM50 million was wasted to come up with the Tak Nak anti-smoking in educating the public
doi:10.1088/0957-4484/25/34/345601
That's because nearly all (more than 99%) e-cigarettes contain nicotine, and some brands (such as Juul) contain an excessive amount