by Sean Adl-Tabatabai, The Peoples Voice:
Popular weight-loss drug Ozempic is shrinking the human heart and other muscles, according to a disturbing new University of Alberta study.
According to researchers, people should be cautious about taking trendy new weight-loss drugs due to the potentially deadly side effects.
Ualberta.ca reports: “If people have been prescribed these drugs, then the benefits should likely far exceed the risks,” says Jason Dyck, lead author on the study, pediatrics professor in the Faculty of Medicine & Dentistry and a member of the Women and Children’s Health Research Institute.
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“However, the growing number of people who may be taking these drugs who do not meet the eligibility criteria and who are not at risk have a different risk-reward calculation that they should be made aware of.”
Dyck and his team set out to study why a reported side-effect of the leading weight-loss drug Ozempic is the loss of skeletal muscle.
Ozempic, known medically as semaglutide, was originally designed to help adult patients with type 2 diabetes control their blood sugar. However, this drug — and a host of others in this class of medication — are also being touted for their effectiveness as an anti-obesity medication.
Using mice for the study, the researchers found that heart muscle also decreased in both obese and lean mice. The systemic effect observed in mice was then confirmed in cultured human heart cells.
Dyck, who is the Canada Research Chair in Molecular Medicine and heads up the Cardiovascular Research Centre, says his team did not observe any detrimental functional effects in hearts of mice with smaller hearts and thus would not expect any overt health effects in humans. But he adds that there may be more impact over the long term, or some forms of cardiac stress may have a detrimental effect that wasn’t observed at rest.
“Given the growing number of people taking this drug who have no cardiovascular disease or who are not classified as obese, we suggest that cardiac structure and function be carefully evaluated in previous and ongoing clinical studies.”
Dyck’s study comes on the heels of a commentary published in the November issue of The Lancet by an international team of researchers from the U of A, McMaster and Louisiana State University who examined emerging research showing that up to 40 per cent of the weight lost by people using weight-loss drugs is actually muscle.
Carla Prado, a nutrition researcher in the Faculty of Agricultural, Life & Environmental Sciences and lead author on the commentary, explains this rate of muscle decline is significantly higher than what is typically observed with calorie-reduced diets or normal aging and could lead to a host of long-term health issues — including decreased immunity, increased risk of infections and poor wound healing.
“Muscle does much more than just help us move or lift things. It is a powerful organ that keeps us healthy in a number of ways,” she says.
For example, muscle stores important building blocks — amino acids — that the body uses when we’re sick, stressed or injured to repair itself and stay strong. It also plays a huge role in managing blood sugar, which helps prevent diabetes.
As well, Prado notes muscle releases special molecules called myokines that signal other parts of the body to help fight infections and support our immune system.
“That’s why preserving muscle is so important, especially during weight-loss treatments — it’s not just about staying strong, but about keeping our whole body resilient and healthy.”
In the commentary, the authors suggest that muscle loss due to weight reduction may also exacerbate conditions like sarcopenic obesity — characterized by a combination of high body fat and low skeletal muscle mass — which contributes to poorer health outcomes, including cardiovascular disease and higher mortality rates.
Though the short-term effects of muscle loss on physical strength and function remain unclear, the commentary calls for future research to explore how reductions in muscle mass might improve muscle mass and composition.
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