Alzheimer’s disease, a neurodegenerative disease, is the leading cause of cognitive decline and dementia in the elderly. This disease is not only caused by genetic factors or aging, but is also greatly influenced by each person’s lifestyle.
According to Dr. Aashka Ponda, neurologist at Bhailal Amin General Hospital, Vadodara (India), smoking is one of the high risk factors for Alzheimer's disease.
The harmful effects of tobacco on the brain
Cigarettes contain many toxic chemicals such as nicotine, carbon monoxide and formaldehyde, all of which can negatively impact the brain, says Dr. Aashka Ponda.
Nicotine, a highly addictive substance, causes long-term brain dysfunction by overstimulating neurotransmitters. This disrupts the balance of acetylcholine, which is necessary for learning and memory, severely affecting cognition.
Carbon monoxide, found in cigarette smoke, reduces the amount of oxygen reaching the brain. Regular exposure to nicotine and carbon monoxide increases the risk of Alzheimer's disease.
The harmful effects of tobacco on brain cells
When the body is exposed to cigarette smoke, it produces free radicals, which damage brain cells. The brain, with its high oxygen demand but weak antioxidant capacity, is vulnerable to oxidative stress. Oxidative stress plays a key role in the formation of beta-amyloid plaques, toxic protein clumps that block communication between nerve cells and lead to brain cell death. This is one of the main factors contributing to the development of Alzheimer's disease.
Effects on blood vessels and brain function
Smoking also damages blood vessels in the body, promoting atherosclerosis and narrowing arteries, limiting blood flow to the brain. This reduced blood circulation can lead to small strokes, adversely affecting brain function and causing cognitive decline in the patient.
Smoking and chronic inflammation
In addition to affecting blood vessels, smoking also contributes to chronic inflammation in the body. Chronic inflammation, especially in blood vessels, can make them more susceptible to rupture or blockage, leading to serious complications such as stroke or brain-related health problems.
Smoking also increases blood pressure and causes inflammation throughout the body, including the brain. Inflammation in the brain can damage the blood-brain barrier, a protective layer that prevents harmful substances from entering the brain.
