The structure provides methods that support the following tasks: 1  Converting Boolean values to strings: ToString. 2  Parsing strings to convert them to Boolean values: Parse and TryParse. 3  Comparing values: CompareTo and Equals.
Nicotine causes inflammation in the arteries, which leads to narrowing and hardening of the blood vessels. When blood can't flow freely to your brain, you're at risk for blood clots, stroke and aneurysms. Nicotine also increases your endorphins, brain chemicals that make you feel good.
However, nicotine replacement therapies (i.e., gum, lozenge, patch, inhaler, and nasal spray) used to help tobacco users quit contain nicotine. Use of nicotine replacement therapy will result in a positive test for cotinine. Therefore, the presence of cotinine is not a conclusive indication of tobacco use.