Calorie restriction aids healthy aging by lowering inflammation

Evan Walker
Evan Walker TheMediTary.Com |
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Calorie restriction can help maintain muscle mass until later in life, and it can promote longevity by reducing inflammation. Image credit: Oleksii Syrotkin/Stocksy.
  • The recent popularity of the world’s Blue Zones has led to increased interest in how a person can not only live longer but also age healthier.
  • Previous research highlights some things people can do for healthier aging.
  • Researchers from the National Institute on Aging have discovered that calorie restriction improves muscle health and stimulates biological pathways important for healthy aging.

With the recent popularity of the world’s so-called Blue Zones, where people tend to live longer than elsewhere on the Globe, there has been a lot of interest and discussion on how a person can not only increase their longevity but also age healthier.

Previous research shows that lifestyle interventions, such as staying active, following a healthy diet, practicing good sleep hygiene, not smoking, and limiting alcohol intake can help people lead healthier lives for longer.

Now, researchers from the National Institutes of Health’s National Institute on Aging have discovered that calorie restriction can improve muscle health and stimulates biological pathways important for healthy aging.

Their study recently appeared in the journal Aging Cell.

For many years, researchers have studied how calorie restriction affects a person’s overall health.

Previous studies show eating fewer calories each day can support weight loss and improve cardiovascular health and cognitive function.

The current study is also not the first to link calorie restriction with longevity. Research published in April 2016 found that calorie restriction helps protect the body from aging through Health">inflammation prevention and other mechanisms.

Moreover, a study published in September 2017 reported that calorie restriction may lead to positive changes in the genes associated with aging.

And research published in February 2022 found that following a calorie-restricted diet may help increase a person’s “health span.”

For this study, scientists examined how calorie restriction helped improve muscle health and conserve muscle function, as a decline in muscle mass and function is known to occur with aging.

“Previous studies have found that while people on calorie restriction were losing muscle mass, they did not lose muscle strength, which suggests that something occurred in the muscle that improves their performance, [and] we wanted to know what,” Dr. Luigi Ferrucci, scientific director of the National Institute on Aging and corresponding author of this study explained to Medical News Today.

“Also, there is evidence in animal models that [calorie restriction] enhances the production of spliced variants of different proteins,” he added.

Dr. Ferrucci and his team analyzed data from study participants in the Comprehensive Assessment of Long-Term Effects of Reducing Intake of Energy (CALERIE) study. This study, supported by the National Institute on Aging, looked at whether moderate calorie restriction in humans offered the same health benefits seen in animal studies.

Although CALERIE study participants were asked to achieve a 25% calorie reduction over 2 years, the highest the group reached was a 12% reduction.

The scientists used thigh muscle biopsies from CALERIE participants to examine how calorie restriction affects human genes.

Using messenger RNA (mRNA) molecules isolated from the biopsies, researchers found that consuming fewer calories upregulated the genes associated with energy generation and metabolism, and downregulated inflammatory genes, resulting in less inflammation.

When explaining how calorie restriction may affect a person’s genes and lead to healthier aging, Dr. Ferrucci said there are many integrated mechanisms involved:

“The most directly understandable is [an] improvement of mitochondrial health and reduction of inflammation. However, very interesting is also the effect on the clock gene that regulates the rhythm of many metabolisms in our body. Overall, these and other mechanisms improve muscle health and function.”

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