tobacco increase blood sugar Studies have found a connection between nicotine and diabetes. Smoking cigarettes or vaping can your risk of type 2 diabetes, since nicotine raises levels. Quitting smoking cuts your risk
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Its still not clear if thats true

In fact, menthols -- often described as "cooling," "soothing," and "smooth" -- make up a growing share of the shrinking cigarette market

A number of patents have been filed for anti-IL-31 antibodies, including IgG4 variants specifically designed to block IL-31 binding to its receptor complex (151)
Int J Electrochem Sci 7:313323 Kazi TG, Jalbani N, Arain MB, Jamali MK, Afridi HI, Sarfraz RA, Shah AQ (2009) Toxic metals distribution in different components of Pakistani and imported cigarettes by electrothermal atomic absorption spectrometer

Although people commonly associate smoking with lung and heart complications, it can also affect the thyroid gland

European Chemicals Agency (ECHA) (accessed May, 12 2022)