However, when you want to compare a Boolean variable with the literal Boolean value true or false, it is not necessary to do an explicit comparison, because the result of evaluating a Boolean value is that Boolean value. For example, the expressions
The nicotine in cigarette smoke is a big part of the problem. It raises your blood pressure and heart rate, narrows your arteries and hardens their walls, and makes your blood more likely to clot. It stresses your heart and sets you up for a heart attack or stroke. Know Your Blood Pressure Numbers.
It is not that chewing tobacco put sugar into your blood stream; it is more of a drug interaction of the stimulant effect of nicotine that affects the blood sugar levels. Chewing tobacco cause the body to release its own stores of sugar and fat by a drug type of interaction. That is how it basically operated as an appetite suppressant, affecting the satiety centers of your hypothalamus. As far as for the sugar levels, nicotine in fact works much more efficiently than food.