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Snuff tobacco is one type of smokeless tobacco product that's more finely ground than chewing tobacco

However, unlike smokeless products, oral nicotine products do not contain tobacco leaf, but instead contain nicotine that is derived from tobacco in a lab or manufactured synthetically

Manufacturers of smokeless tobacco use significant amounts of sugar in their product to improve the flavor

For Live Science, Christopher covers public health, nutrition and biology, and he has written extensively for The Washington Post and Sky & Telescope among others, as well as for the NASA Goddard Space Flight Center, where he was a senior writer