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  2. Sep 14, 2023 · Stress. Depression. Schizophrenia. Addiction. When a person smokes tobacco, nicotine reaches the brain within 10 seconds. For some people, nicotine improves mood and helps with relaxation....

  3. Smoking can seem to boost mental health in the short term, temporarily stabilizing mood, but it can be harmful in the long term by exacerbating stress, anxiety, and depression. Research suggests...

    • Overview
    • How does nicotine affect the brain?
    • Cognitive decline
    • Brain volume
    • Stroke
    • Dementia
    • Cancer
    • How do e-cigarettes affect the brain?
    • Does quitting smoking help?
    • Tips for quitting smoking

    Smoking, and its harmful substances such as nicotine, can harm almost every part of the body, including the brain. It can also lead to other brain conditions, such as cancer, dementia, and stroke.

    Smoking is the leading cause of preventable, premature death in the United States.

    Studies show that smoking has a negative effect on multiple cognitive functions, and the American Heart Association (AHA) recommends quitting smoking to preserve brain health.

    This article discusses the effects that smoking has on the brain and whether quitting smoking makes a difference.

    Nicotine is a highly addictive substance that gives the body a rush of endorphins when it enters the bloodstream and increases dopamine levels. Over time, a person needs more nicotine to feel that dopamine reward.

    Repeated exposure to nicotine can alter circuits in the brain involved with stress, learning, and self-restraint. If a person has been smoking for a long time, these brain changes can often result in addiction which can lead to withdrawal symptoms such as irritability, anxiety, problems with memory, and difficulty concentrating.

    Studies suggest that metals such as iron, copper, and zinc — which appear in cigarette smoke — can build up in the body and impair cognitive functions.

    Studies alsoshow that smoking creates changes in white matter (WM) lesions on the brain, which can cause a decline in cognitive functions.

    Over time, smoking can impair cognitive functions such as:

    •information processing

    •memory

    •concentration

    A study published in 2018 suggests that smoking can cause a decrease in brain volume. It also suggests that the more cigarettes a person smokes, the greater the decrease in brain volume.

    If a person has a lower brain volume, they are typically more likely to have a decline in their cognitive functions.

    Smoking tobacco can increase the risk of stroke. Smoking tobacco can make the blood sticky and more likely to clot, which can lead to a stroke. Smoking can also increase levels of harmful cholesterol known as LDL, which can increase the risk of a stroke.

    Nicotine and carbon monoxide in cigarette smoke can also lead to a stroke. Carbon monoxide can reduce the amount of oxygen in the blood while nicotine can speed up the heart rate. Both can lead to high blood pressure, which is one of the leading causes of a stroke.

    According to a 2015 study, people who smoke are 30% more likely to develop dementia than people who do not.

    Studies show that smoking can lead to a reduced volume of gray matter (GM) in the brain. When a person has less GM on the brain, they may be more likely to develop dementia.

    Smoking tobacco is the greatest risk factor for developing lung cancer.

    Approximately 40% of people with lung cancer may develop brain metastasis which is a form of cancerous brain tumor. Studies show that a person with lung cancer who smokes and inhales nicotine is more likely to develop brain metastasis than a person who does not smoke.

    E-cigarettes are still a relatively new product, so there is a limited amount of research on their short-term and long-term health effects.

    However, e-cigarettes contain nicotine and other harmful substances that may lead to a decline in cognitive functions. Exposure to nicotine can also raise the heart rate, which can lead to high blood pressure and a stroke.

    The CDC suggests that quitting smoking can improve brain health. Over time it can also decrease the risk of having a stroke and developing brain conditions such as dementia.

    Some tips for an action plan to quit smoking can include:

    •picking a date to quit that is not too far away and sticking to it

    •listing the reasons why a person is quitting smoking

    •telling family and friends that a person is quitting smoking so they can be supportive

    •using quit smoking support such as the Smokefree app, phoning a quitline such as the National Cancer Institute Quitline, or speaking with a quit smoking counselor such as LiveHelp

    •listing triggers and cravings and what a person can do to distract themselves

    • Sarah Vevers
  4. Feb 1, 2020 · Smoking may increase your chances of developing schizophrenia or depression, says a study published Nov. 6, 2019, in Psychological Medicine. It's long been known that people with mental illness are more likely to smoke than those without mental illness. But no one ever looked at what came first — the smoking or the mental illness.

    • 4 Blackfan Circle, 4th Floor, Boston, 02115, MA
    • hhp_info@health.harvard.edu
    • (877) 649-9457
  5. Nicotine actually affects brain chemistry and emotions. What you might feel when you quit tobacco. Depression. Sadness or grief. A sense of loss. Frustration. Impatience. Anger. Anxiety. Irritability. Trouble concentrating. Restlessness or boredom. What you can do. There are many tools to help quit tobacco for good.

  6. At first, nicotine improves mood and concentration, decreases anger and stress, relaxes muscles and reduces appetite. Regular doses of nicotine lead to changes in the brain, which then lead to nicotine withdrawal symptoms when the supply of nicotine decreases.

  7. Aug 3, 2017 · This paper provides a broad overview of smoking in terms of: the health effects, benefits of stopping, prevalence and patterns of use, psychological, pharmacological and social factors leading to uptake and maintenance of the behaviour, effectiveness of population level and individual level interventions to combat it, and methods used to reduce ...

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