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  • Vitamin D and fish oil...

Vitamin D and fish oil supplements may reduce risk of autoimmune disease, trial finds

Dr. Kamal Kant KohliWritten by Dr. Kamal Kant Kohli Published On 2022-01-27T09:00:20+05:30  |  Updated On 27 Jan 2022 4:46 AM GMT
Vitamin D and fish oil supplements may reduce risk of autoimmune disease, trial finds
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A new study has revealed that Vitamin D and fish oil supplements may reduce risk of autoimmune disease.Taking daily vitamin D supplements - or a combination of vitamin D and omega-3 fish oil - appears to carry a lower risk of developing autoimmune disease, with a more pronounced effect after two years, finds a trial of older US adults published by The BMJ today.The researchers say...

A new study has revealed that Vitamin D and fish oil supplements may reduce risk of autoimmune disease.

Taking daily vitamin D supplements - or a combination of vitamin D and omega-3 fish oil - appears to carry a lower risk of developing autoimmune disease, with a more pronounced effect after two years, finds a trial of older US adults published by The BMJ today.

The researchers say the clinical importance of these findings is high, "given that these are well-tolerated, non-toxic supplements, and that there are no other known effective therapies to reduce rates of autoimmune diseases."

Autoimmune disease happens when the body's natural defence system mistakenly attacks normal cells. Common conditions include rheumatoid arthritis, psoriasis, and thyroid diseases, which increase with age, particularly among women.

Both vitamin D and omega-3 fatty acids derived from seafood are known to have a beneficial effect on inflammation and immunity, but no large randomised trials have tested whether these supplements can lower the risk of autoimmune disease.

So researchers set out to test the effects of vitamin D and omega-3 fish oil supplements on rates of autoimmune diseases in 25,871 US adults (average age 67; 51% women; 71% non-Hispanic white).

When they joined the trial, participants provided information on their age, ethnicity, region of residence, income, education, lifestyle, weight, medical history, diet and supplement use. Blood levels of vitamin D and omega-3 fatty acids were also measured.

Participants were then randomly allocated to receive vitamin D (2,000 IU/day) or matched placebo, and omega-3 fatty acids (1,000mg/day) or matched placebo, and were asked to report any diagnosed autoimmune disease over an average 5.3 year period.

These included rheumatoid arthritis, polymyalgia rheumatica (pain and stiffness in the muscles around the shoulders, neck and hips), thyroid disease, and psoriasis, among others.

Reported cases were confirmed using medical records. Those with insufficient documentation for certainty were classed as "probable" cases.

Over the full duration of the trial, a confirmed autoimmune disease was diagnosed in 123 participants in the vitamin D group compared with 155 in the placebo group - a 22% lower relative rate.

In the omega-3 fatty acid group, 130 confirmed cases were diagnosed compared with 148 in the placebo group (a 15% reduction), but this was not a statistically significant result.

However, when probable cases were included, omega-3 fatty acid supplements did significantly reduce the rate by 18% compared with placebo and there was a significant interaction with time, indicating a stronger effect the longer supplements were taken.

Similar results were found when only the last three years of the trial were considered. The vitamin D group had 39% fewer confirmed cases than placebo, while the omega-3 fatty acid group had 10% fewer confirmed cases than placebo. Both vitamin D and omega-3 fatty acid supplements decreased autoimmune disease by about 30% versus placebo alone.

This was a large trial involving a diverse general population with high rates of follow-up and adherence to treatment. However, the researchers acknowledge that they tested only one dose and formulation of each supplement, and say the results may not apply to younger individuals.

Nevertheless, they say this is the first direct evidence that daily supplementation with either agent - or a combination of vitamin D and omega-3 fatty acids - for five years among older US adults reduces autoimmune disease incidence, with more pronounced effect after two years of supplementation.

"We are continuing to follow participants for two years in an extension study to test the time course of this autoimmune disease reduction effect," they write. "Further trials could test these interventions in younger populations, and those with high autoimmune disease risk."

For further reference log on to:

:https://www.bmj.com/content/376/bmj-2021-066452


Vitamin Dfish oil supplementsautoimmune diseaseThe BMJ today
Source : The BMJ today
Dr. Kamal Kant Kohli
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. Before Joining Medical Dialogues, he has served at important positions in the medical industry in India including as the Hony. Secretary of the Delhi Medical Association as well as the chairman of Anti-Quackery Committee in Delhi and worked with other Medical Councils in India. Email: editorial@medicaldialogues.in. Contact no. 011-43720751

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