Review of cigars and cigar-type products as potential sources of consumer exposure to heavy metals.

The popularity of cigars, growing since 1993, has not gone hand in hand with the increased interest of researchers in these products. Although the literature widely describes the harmfulness of tobacco and the content of toxic substances in tobacco products, the topic is often treated selectively as relating primarily to cigarettes and rarely extends to other products of the broadly defined tobacco industry. However, there is no reason to marginalize the harmful effects of other nicotine products, (which include tobacco products such as cigars). The study analyzed the available literature on the content of selected heavy metals in cigar tobacco. Among the heavy metals, the following contents of elements in tobacco were recorded in cigars: Fe (420-2200 µg/g), Mn (100-370 µg/g), Zn (14-180 µg/g), Cu (15-140 µg/g), Pb (not detected-32 µg/g), Cd (nd-19 µg/g), Ni (nd-13 µg/g), Cr (nd-10 µg/g), Co (0.65-1.0 µg/g), As (nd-0.66 µg/g), Hg (18-25 ng/g). Importantly, the values often differ between cigars of different origins and types, indicating the need for more extensive research.