Metformin has been used for many years to help people with type 2 diabetes lower their blood sugar.
It is one of the most widely prescribed medicines in the world because it is effective, affordable, and has a good safety record for most people.
Now, researchers believe this familiar medicine may have another important benefit. A new study suggests that Metformin could help older adults protect their muscles and recover more quickly after illness, surgery, or long periods of bed rest.
As people grow older, keeping muscles healthy becomes increasingly important. Strong muscles help people walk, climb stairs, carry groceries, and remain independent.
When muscles become weak, the risk of falls, broken bones, disability, and longer hospital stays increases. Older adults often lose muscle quickly after an operation, an injury, or even a few days of staying in bed. Unfortunately, rebuilding that lost muscle can be slow and difficult.
This new research was carried out by scientists at the University of Utah Health and led by Dr. Micah Drummond. The team focused on special cells known as senescent cells. These cells are sometimes called ‘zombie cells’ because they stop working properly but do not die as healthy cells normally should.
Instead, they remain in the body and release substances that increase inflammation and encourage scar tissue to develop. Too many of these cells can make muscles weaker and slow the healing process.
The researchers discovered that Metformin appears to calm these harmful cells. By reducing their activity, the medicine may lower inflammation and reduce muscle scarring. This could help older muscles recover more effectively after stress or injury.
To investigate this idea, the researchers recruited 20 healthy older adults. Before the study began, each volunteer underwent an MRI scan and a muscle biopsy so the scientists could carefully examine their muscles.
The participants were then randomly divided into two groups. One group received Metformin, while the other received a placebo, a tablet with no active medicine.
Everyone then completed five days of bed rest. Although this may not sound like a long time, even a few days without normal movement can cause noticeable muscle loss in older adults. After the bed rest period, the participants had another MRI scan and muscle biopsy. They then returned to normal daily activities for seven days before having one final muscle biopsy.
The results were encouraging. People who took Metformin lost less muscle during bed rest than those taking the placebo. They also developed less scar tissue and had fewer harmful senescent cells in their muscle tissue. These findings suggest that the medicine helped protect muscle health while the body was inactive.
This is the first study to clearly show that Metformin may improve muscle recovery in older adults by reducing harmful cellular changes. Lead author Jonathan Petrocelli said the long-term goal is to help older people stay stronger, healthier, and more independent as they age.
The researchers are already exploring whether combining Metformin with leucine, an amino acid that helps build muscle, could provide even greater benefits. Early studies in animals have produced promising results, although more research in people will be needed before doctors can recommend this approach.
Although the findings are exciting, this was a small study involving only 20 participants. Larger clinical trials are still needed to confirm the results and determine which patients might benefit the most. People should not start taking Metformin unless it is prescribed by their healthcare professional, as every medicine has possible side effects and may not be suitable for everyone.
Even so, the study opens an exciting new direction for healthy aging research. If future studies confirm these results, an inexpensive medicine that has been used safely for decades could help millions of older adults recover faster after surgery, illness, or periods of inactivity.
Helping people maintain muscle strength could improve independence, reduce falls, shorten recovery times, and support a better quality of life in later years.
If you care about diabetes, please read studies about bananas and diabetes, and honey could help control blood sugar.
For more health information, please see recent studies about Vitamin D that may reduce dangerous complications in diabetes and plant-based protein foods may help reverse type 2 diabetes.
The research was published in the journal Aging Cell.
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