From protecting the heart to potentially slowing biological ageing, four medical experts reveal why GLP-1 drugs such as Wegovy and Ozempic could become the next big thing in longevity medicine – and whether we might one day take them simply to live longer.
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Weight loss injections have already transformed the way millions of people manage their weight. But could drugs such as Wegovy and Ozempic eventually be used for something far bigger – helping us live longer?
It might sound too good to be true, but scientists are now investigating whether these medications could do more than help people shed unwanted pounds. In fact, early research suggests they may influence some of the biological processes involved in ageing.
So, could we one day be prescribed a weight loss injection even if we don’t need to lose weight, simply to help us stay healthier for longer?
According to four medical experts, it’s a possibility worth investigating. But before we start thinking of these drugs as the latest anti-ageing breakthrough, there’s still plenty we need to understand.
The mouse experiment that has scientists talking
One of the most interesting developments comes from a 2026 study published in Nature involving older female mice given semaglutide, the active ingredient in Wegovy and Ozempic.
Researchers found that mice receiving the medication showed improvements in several areas associated with ageing, including memory, muscle function, balance, endurance and cellular health.
Even more interestingly, a separate group of mice that continued receiving the treatment lived longer.
“The mouse study is interesting because the changes went beyond weight,” explains Dr Carrie Carda.
She says that after three months, treated mice showed reduced inflammation, improved mitochondrial function – which helps cells produce energy – and fewer signs of cellular damage.
But does that mean the same thing could happen in humans?
Not necessarily. Referring to the study, Dr Stephen Cosentino said:
“Whilst it found that semaglutide slowed several measures of aging and extended lifespan in older female mice – that does not mean we have demonstrated the same effect in humans.
“It’s an important distinction. Whilst the findings are exciting, what works in mice doesn’t automatically work in people,” he explains.
Could weight loss injections really slow biological ageing?
To understand why scientists are so interested, it helps to know the difference between biological and chronological age.
Your chronological age is simply how many birthdays you’ve celebrated. Biological age, however, looks at how well your body is functioning compared with what’s typical for your age.
“Genes, environmental factors, and habits can influence your biological age so yes, you can slow biological aging to some extent,” explains Dr Michael Ellis Dr Michael Ellis.
He points out that exercise, diet, smoking, alcohol and sleep all play a role.
And whilst he says there’s currently no evidence that these medications truly slow biological ageing in humans, they may improve some of the factors that influence it.
Pharmaceutical scientist Sanjiv Lav Sanjiv Lav believes we could be witnessing a significant change in how doctors approach ageing.
“For decades, traditional medicine has focused on treating the consequences of aging. Now we are beginning to investigate whether we can influence the process itself.”
There is also early human research worth paying attention to.
Dr Cosentino points to a 2026 study which found changes in several epigenetic ageing measures after 32 weeks of semaglutide treatment. However, the research involved people with HIV-associated abdominal fat accumulation, rather than the general population.
Could you take Wegovy or Ozempic even if you’re slim?
This is perhaps the biggest question surrounding the future of these medications.
After all, if they eventually prove to have longevity benefits, could people who are already a healthy weight start taking them?
Sanjiv believes there’s good reason to investigate.
“We have made a fundamental mistake in medicine by equating being thin with being healthy.”
He explains that someone can appear slim whilst still having insulin resistance, inflammation or an increased risk of cardiovascular disease.
“Your bathroom scale does not measure biological age, and it certainly does not measure cellular health.”
But Dr Cosentino urges caution.
“We do not have enough evidence to prescribe semaglutide to healthy, normal weight people simply because they want to live longer.”
Dr Carda agrees, pointing out that someone who doesn’t need to lose weight could end up losing too much, eating too little or experiencing unwanted side effects.
For now, the evidence simply isn’t there to justify prescribing these drugs to otherwise healthy people purely for longevity.
Could they protect your heart, brain and kidneys as you age?
Whilst the anti-ageing research is still in its early stages, there is already stronger evidence that GLP-1 medications can benefit certain organs.
Dr Ellis highlights the https://www.nejm.org/doi/full/10.1056/NEJMoa2307563 SELECT trial, which found that semaglutide reduced the risk of major cardiovascular events, including heart attacks and strokes, in people with overweight or obesity and existing cardiovascular disease.
“Heart disease is the number one cause of death in America so reducing risk of heart disease can help people live longer, healthier, lives.”
There are also encouraging findings involving kidney health, particularly among people with type 2 diabetes and chronic kidney disease.
But what about the brain?
Researchers are investigating whether GLP-1 medications could influence inflammation, insulin signalling and other processes associated with cognitive decline.
“The brain may be the next frontier,” says Sanjiv.
However, he stresses that these drugs haven’t been proven to prevent Alzheimer’s disease.
For now, their established cardiovascular and metabolic benefits are far more convincing than claims about preventing dementia or slowing ageing itself.
Is it the weight loss or the medication that’s making the difference?
Another question researchers are trying to answer is whether the potential longevity benefits come from losing excess weight or from the medication itself.
According to Dr Ellis, reducing visceral fat – the dangerous fat stored around our internal organs – can make a significant difference to health.
Even losing five to ten per cent of body weight can improve blood sugar control, heart health, sleep and mobility.
But Sanjiv believes there may be more going on.
“GLP 1 medications are also acting on signaling pathways that regulate metabolism, appetite and glucose control. Some clinical benefits appear to extend beyond what can be explained by weight loss alone.”
Dr Cosentino points out that the mouse research also suggests some effects may be different from those achieved through calorie restriction.
However, separating the effects of weight loss from those of the medication remains difficult.
And there’s another issue worth remembering – muscle loss.
Dr Ellis warns that eating significantly fewer calories and too little protein whilst taking these medications can lead to a loss of muscle mass.
That’s particularly important as we get older, when maintaining strength and mobility becomes increasingly important.
Could women over 50 benefit from these anti-ageing effects?
For women going through menopause, the potential health benefits are particularly interesting.
Hormonal changes can affect where fat is stored, blood sugar regulation and cardiovascular risk, making metabolic health increasingly important.
Dr Cosentino explains that improving weight, glucose control and cardiovascular health can offer meaningful benefits for women over 50.
However, he stresses that semaglutide hasn’t been proven to specifically slow ageing in menopausal women.
And whilst the mouse longevity study involved older females, that doesn’t mean the results can be directly applied to women.
Clearly, there’s still a lot more research to be done before these medications can be considered anti-ageing treatments.
Will weight loss injections become the next big longevity treatment?
So could we eventually reach a point where doctors prescribe GLP-1 injections not to help us lose weight, but to keep us healthier as we get older?
Sanjiv certainly thinks the way we describe these drugs could change.
“I believe we are going to stop calling them weight loss injections altogether.”
He believes future treatments could focus on improving metabolic health, reducing inflammation and protecting organs, rather than simply reducing the number on the scales.
Dr Ellis can also see them becoming part of anti-ageing medicine, particularly when they help people make healthier lifestyle changes.
But Dr Carda believes the real test will be whether patients remain stronger, healthier and more independent as they age.
“The goal is more years of strength, independence, and doing what makes life worth living.”
The takeaway
Weight loss injections may eventually have a much bigger role in medicine than simply helping people lose weight.
Research involving mice and early human ageing markers is encouraging, whilst the proven heart and kidney benefits in certain patients already make these drugs an important tool for healthier ageing.
But there is currently no convincing evidence that taking Wegovy or Ozempic purely for longevity will help an otherwise healthy person live longer.
For now, exercise, good nutrition, sleep and maintaining muscle strength remain essential.
As Sanjiv puts it: “We are not trying to make people live forever. We are trying to make sure that at 70, 80 or even 90, they are still living with strength, independence, energy and purpose.”
