Glp-1 Obesity Drugs Mainly Reduce Fat While Preserving Muscle Mass

New investigation to beryllium presented astatine nan European Congress connected Obesity (ECO2026) successful Istanbul, Turkey (12–15 May) shows that pursuing curen pinch GLP-1 narcotics for obesity, astir weight nonaccomplishment is fat wide (80–85%) and comparative musculus wide is preserved. The study is by Emilia Ida Frohner, Dr Alexander Jürets and Dr Bianca Karla-Itariu, Metabolism Center N°12 Antonigasse, Vienna, Austria and Medical University of Vienna, Austria.

Multiple objective tests person shown glucagon-like peptide-1 (GLP-1)-based treatments (semaglutide/liraglutide) and GIP/GLP-1 (glucose-dependent insulinotropic polypeptide) dual agonists (tirzepatide) are safe and lead to weight simplification and decreased consequence for adverse objective outcomes. However, researchers are still trying to understand nan comparative effects connected musculus and fat wide arsenic a personification loses weight utilizing these drugs.

Bioelectrical Impedance Analysis (BIA) is a non-invasive, fast, and comparatively inexpensive method for estimating assemblage composition-including assemblage fat, thin musculus mass, and water-by sending a low-level electrical existent done nan body. It relies connected nan rule that thin insubstantial conducts energy amended than fat.

Understanding changes successful assemblage composition, alternatively than weight alone, is basal to measure curen value and semipermanent functional outcomes utilizing obesity drugs. In this caller study, nan authors analysed changes successful skeletal musculus wide and fat wide during GLP-1RA aliases GIP/GLP-1RA therapy successful adults pinch obesity utilizing bioelectrical impedance study (BIA), and to measure nan narration betwixt fat nonaccomplishment and musculus wide preservation complete time.

This retrospective cohort study included 486 big patients pinch obesity (18% male, 82% female; mean BMI 37.68 kg/m²; mean property 49.9 years) treated pinch GLP-1 receptor agonists aliases GIP/GLP-1 receptor agonists (liraglutide [8%], semaglutide [82%], aliases tirzepatide [8%]) astatine a specialised backstage obesity outpatient session successful Vienna betwixt 2022 and 2025. All patients received recommendations regarding beingness workout arsenic per existent guidelines. Body creation was assessed utilizing bioelectrical impedance study (BIA), a non-invasive method for estimating fat and musculus mass.

Changes successful absolute and comparative skeletal musculus wide and fat wide from baseline to follow-up were analysed crossed different curen durations (<6 months, 6–24 months, >24 months). If aggregate measurements were disposable wrong a predefined clip window, a azygous measurement per individual was selected based connected nan longest clip since baseline. Computer modelling to set for repeated measurements was applied and adjusted for fat mass, clip since curen initiation, age, sex, and baseline BMI.

After a mean curen long of astir 14 months, patients achieved a mean weight nonaccomplishment of 9.9%. Fat wide decreased by 9.0 kg (around 18%), while skeletal musculus wide decreased by only 1.2 kg (around 5%). Relative skeletal musculus wide was preserved aliases accrued successful much than 70% of patients. Statistical modelling showed that musculus wide remained unchangeable complete clip erstwhile accounting for changes successful fat mass, suggesting favourable assemblage creation changes alternatively than clinically applicable musculus wasting.

The authors statement that this is simply a retrospective real-world study pinch inherent limitations, including missing data, nary placebo group, and a predominantly female study population. The findings use to this circumstantial curen group and duration; larger prospective tests are needed to measure semipermanent effects.