three types of toxic substances found in cigarette smoke. Tar Active Smoking | COSH

Due to the light and screen setting difference, the actual color may be slightly different from the pictures

Sidestream smoke actually has higher concentrations of toxic compounds than mainstream smoke does

This process avoids the combustion of tobacco, which is the primary source of harmful chemicals in traditional cigarettes

Current guidelines recommend that pregnant smokers who find quitting difficult should be provided with nicotine replacement products, and stop-smoking services usually recommend nicotine patches

Moreover, variations in e-liquid composition have been analyzed showing different effects on immune checkpoint expression ( Figure 1 )