Semaglutide started late in life slowed ageing and extended lifespan in female mice
In 20-month-old female mice, three months of semaglutide improved physiological function and attenuated ageing hallmarks; continued treatment extended lifespan. In a longitudinal comparison, semaglutide preserved baseline function and matched many benefits of calorie restriction, with some outcomes better than calorie restriction. [1]
Automatic summary · not editorially reviewed
The key findings
Twenty-month-old female C57BL/6 mice received semaglutide for 3 months, which improved physiological function and attenuated hallmarks of ageing. [1]
Continued semaglutide treatment extended lifespan in mice. [1]
In a longitudinal comparison with matched calorie restriction, semaglutide preserved baseline function and showed more favourable trajectories than calorie restriction in exploratory drive, spatial memory and glucose control. [1]
The source at a glance
- Study type / format
- Preclinical mouse study (abstract)
- Population / context
- 20-month-old female C57BL/6 mice
- Summary based on
- Study abstract
- Original publication
- September 2, 2026
Semaglutide in 20-month-old female mice
The abstract describes treating 20-month-old female C57BL/6 mice with the GLP-1 receptor agonist semaglutide for 3 months. This improved physiological function, attenuated hallmarks of ageing and modulated nutrient sensors and conserved genetic regulators of ageing. The authors note that GLP-1 medicines have shown beneficial effects beyond glucose and weight control, but little is known about the basis of these effects.
Supporting source [1]
Lifespan and comparison with calorie restriction
Continued treatment extended mouse lifespan. In a longitudinal study directly comparing semaglutide with matched calorie restriction, semaglutide preserved baseline function and reproduced many functional benefits of calorie restriction by attenuating age-associated decline. It also produced improvements above baseline and more favourable trajectories than calorie restriction in exploratory drive, spatial memory and glucose control. The authors describe these effects as paralleling key features of calorie restriction.
Supporting source [1]
Mouse findings and proposed framework only
The authors conclude that GLP-1 receptor activation started late in life slows ageing and extends lifespan in female mice. They propose it acts as a calorie restriction mimetic and offer a mechanistic framework that may help explain its broad beneficial effects, while revealing effects beyond those attributable to reduced calorie intake. These are findings in female mice; the abstract does not report human outcomes, and the framework is proposed, not validated.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. Findings concern female C57BL/6 mice, not humans. The calorie restriction mimetic role and mechanistic framework are proposed interpretations, not validated conclusions.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Feng Y, Barthez M, Wang Y, Chen Y, Qiu H, Wang CL, Heydari K, Delcroix M, Rasmussen LJ, Bohr VA, Chen D. · europepmc.org · September 2, 2026