chewing tobacco immune system Divergent Effect of Cigarette Smoke on Innate Immunity in Inflammatory Bowel Disease: A Nicotine-Infection Interaction Chewing Tobacco and Bladder Cancer:

[52] Cannabinoids produce a marked depression of motor activity via activation of receptors of cannabinoid receptor type 1

The inside of your windshield gets dirty too, as contaminated outside air blows on the inside of your glass through your defroster vents, and oils, moisture, and even cigarette smoke can cause the inside of your windshield to get dirty

Ecol Dis 1982

They conclude, These data suggest that a longer duration of endogenous oestrogen deprivation is associated with subjective olfactory dysfunction. Another study in 2002 stated, Since estrogen and progesterone protect the olfactory function, changes in their levels in particular physiological states in women (in pregnancy and postmenopause) exert an influence on the ability to feel and recognize smells. Its also known that womens bacteria can change going through menopause