why chewing tobacco is harmful for health Side Effects, Risks, Tips on Quitting Smokeless tobacco products are harmful.

But insect stings can be painful, and in some cases, dangerous

The researchers noted that smoking adversely affects preferences for vitamin C rich foods, the inverse association between smoking and serum vitamin C levels occurs independently of dietary intake. This means smokers put themselves in a deep vitamin C hole by an apparent aversion to vitamin C rich foods (whether this is caused by smoking or is merely a characteristic shared by smokers is unknown) while the act of smoking depletes the meager amounts of vitamin C circulating in smokers bloodstreams

Principles of Flue-Cured Tobacco Production

PMID 11606795