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Donald Tashkin, a UCLA pulmonologist who has studied marijuana for 30 years, hypothesized that the chemical THC may prevent the cancer-causing chemicals in marijuana smoke from negatively affecting the body: The THC in marijuana has well-defined anti-tumoral effects that have been shown to inhibit the growth of a variety of cancers in animal models and tissue culture systems, thus counteracting the potentially tumorigenic effects of the procarcinogens in marijuana smoke

Lets explore whether panel drug tests include nicotine

Hal Morgenstern, a University of Michigan epidemiologist, this factor was likely attributable to the differences between marijuana and tobacco use: When you think about people smoking 20 to 40 cigarettes a day for 40 years, they're smoking hundreds of thousands of cigarettes

[41] Fetal development In pregnancy, a 2013 review noted that "nicotine is only 1 of more than 4000 compounds to which the fetus is exposed through maternal smoking