Blood sodium levels linked to cognition in older adults

Published: 09 February, 2018 21:01 IST | IANS | New York

A lower level of sodium in the blood may affect cognitive functions with advancing age, a new study has warned.

Representational picture

A lower level of sodium in the blood may affect cognitive functions with advancing age, a new study has warned. Hyponatremia is a condition that occurs when the level of sodium in the blood falls below 135 Millimoles Per Litre (mmol/L).

The results indicate that sodium levels may help preserve cognition as individuals age.

"Slightly lower sodium levels in the blood are likely to be unnoticed in clinical practice," said the co-author of the study, Kristen Nowak from the University of Colorado Anschutz Medical Campus.

"Because both slightly lower serum sodium levels and mild changes in cognitive function are common occurrences with advancing age, future research on this topic is important -- including determining whether correcting lower sodium levels affects cognitive function," Nowak added.

For the study, to be published in the Clinical Journal of the American Society of Nephrology, researchers examined information on 5,435 asymptomatic community-dwelling men aged 65 years and above who were followed for a median of 4.6 years.

A total of 100 men had serum levels indicative of hyponatremia.

The researchers found that slightly lower sodium levels in the blood were related to both cognitive impairment and declines in cognitive function over time.

Compared with men with sodium levels of 141-142 mmol/L, men with levels of 126-140 mmol/L were 30 per cent more likely to have cognitive impairment at baseline and 37 per cent more likely to experience cognitive decline over time.

They also found an association of high serum sodium (143-153 mmol/L) with cognitive decline over time.

Catch up on all the latest Mumbai, National and International news here

Download the new mid-day Android and iOS apps to get updates on all the latest and trending stories on the go

The content/reporting displayed on our website is provided "AS-IS," "AS AVAILABLE, by us from third party, agencies, sources, without any verification from our side. It may contain error, bugs and other limitations. The reader's can rely on the content at their own will. Mid-day accepts no responsibility or liability for its dependability, trustworthiness, reliability, data, text, images, video, messages, or any other material whatsoever or for any claims/loss/action that the reader may suffer as a result of relying on the content on our site. Mid-day management/ reserves the sole right to alter, delete or remove (without notice) the content in its absolute discretion for any reason whatsoever.

Trending Video

Sign up for all the latest news, top galleries and trending videos from

loading image
This website uses cookie or similar technologies, to enhance your browsing experience and provide personalised recommendations. By continuing to use our website, you agree to our Privacy Policy and Cookie Policy. OK