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Regular use of laxatives may heighten risk of dementia, finds study - Video

Published On 2023-02-24T09:30:13+05:30  |  Updated On 24 Feb 2023 12:30 PM IST
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Overview

Regular use of laxatives may increase the risk of developing dementia by more than 50% according to a study published in the February 22, 2023, online issue of Neurology®, the medical journal of the American Academy of Neurology. Researchers also found people who used only osmotic laxatives, a type of laxative that attracts water to the colon to soften stool, had an even greater risk. Other types of laxatives are bulk-forming, stool-softening, and stimulating. The study does not prove that laxatives cause dementia. It only shows an association.

“Constipation and laxative use are common among middle-aged and older adults,” said study author Feng Sha, PhD, of the Shenzhen Institute of Advanced Technology at the Chinese Academy of Sciences in Guangdong, China. “However, regular laxative use may change the microbiome of the gut, possibly affecting nerve signaling from the gut to the brain or increasing the production of intestinal toxins that may affect the brain. Our research found regular use of over-the-counter laxatives was associated with a higher risk of dementia, particularly in people who used multiple laxative types or osmotic laxatives.”

Sha noted that osmotic and stimulant laxatives are not recommended for regular use, yet some people use them regularly.

The study involved 502,229 people in the UK biobank database with an average age of 57 who did not have dementia at the start of the study. Of this group, 18,235 people, or 3.6%, reported regularly using over-the-counter laxatives. Regular use was defined as using a laxative most days of the week during the month before the study.

Over an average of 10 years, 218 of those who regularly used laxatives, or 1.3%, developed dementia. Of those who did not regularly use laxatives, 1,969 people, or 0.4%, developed dementia.

After adjusting for factors such as age, sex, education, other illnesses and medication use, and a family history of dementia, researchers found people who regularly used laxatives had a 51% increased risk of overall dementia compared to people who did not regularly use laxatives.

The risk of dementia also increased with the number of laxative types used. For people using one type of laxative, there was a 28% increased risk, compared to a 90% increased risk for people taking two or more types of laxatives.

However, among people using only one type, only those taking osmotic laxatives had a heightened risk, with a 64% increase compared to those who did not use laxatives.

“Finding ways to reduce a person’s risk of dementia by identifying risk factors that can be modified is crucial,” said Sha. “More research is needed to further investigate the link our research found between laxatives and dementia. If our findings are confirmed, medical professionals could encourage people to treat constipation by making lifestyle changes such as drinking more water, increasing dietary fiber and adding more activity into their daily lives.”

A limitation of the study is that dosage information for laxatives was not available so researchers could not explore the relationship between various laxative dosages and dementia.

Reference:

Feng Sha et al,AMERICAN ACADEMY OF NEUROLOGY,Neurology.

Speakers

Isra Zaman

B.Sc Life Sciences, M.Sc Biotechnology, B.Ed

Isra Zaman is a Life Science graduate from Daulat Ram College, Delhi University, and a postgraduate in Biotechnology from Amity University. She has a flair for writing, and her roles at Medicaldialogues include that of a Sr. content writer and a medical correspondent. Her news pieces cover recent discoveries and updates from the health and medicine sector. She can be reached at editorial@medicaldialogues.in.

Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751
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