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[203] [196] Natural occurrence [edit source] Nicotine is a secondary metabolite produced in a variety of plants in the family Solanaceae, most notably in tobacco Nicotiana tabacum , where it can be found at high concentrations of 0.5 to 7.5%

smoking habits may vary with time and this is not always registered in medical records

He is an alcoholic and I need to find a place that will treat his addiction along with medical supervision fit his medications

"Let's march around the other side..." he said

Our findings challenge the widely held belief that tobacco-free means risk-free, said Sameer Patel, an assistant professor at IITGN, in a news release