Many studies provide results for smoking of any product (162 studies, 60.7%) or for cigarettes (147, 55.1%), but less do so for cigarette only smoking (55, 20.6%), smoking of pipes/cigars only (62, 23.2%), mixed smoking (29, 10.9%), or for the cigarette type indices filter/plain cigarette smoking (38, 14.2%), hand-rolled cigarette smoking (15, 5.6%), or mentholated cigarette smoking (3, 1.1%)
Improved Focus (Short-Term) Some smokers report that nicotine helps sharpen concentration during mentally demanding tasks
Methylamine a gas with a distinctive odour used mainly in industrial processes
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