Evidence mapPaperPMID 41978142Full record

ArticleNutrients2026

Short-Term Associations Between Fat-Free Mass Preservation and Glycaemic Markers During Tirzepatide Therapy: A Secondary Exploratory Analysis.

Luigi Schiavo, Biagio Santella, Monica Mingo, Gianluca Rossetti, Marcello Orio, Luigi Cobellis, Francesco Cobellis, Vincenzo Pilone

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Article in Nutrients, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

8 authors.

Luigi SchiavoDepartment of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, 84081 Baronissi, Italy.ORCID 0000-0003-3639-6847
Biagio SantellaDepartment of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, 84081 Baronissi, Italy.
Monica MingoDepartment of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, 84081 Baronissi, Italy.
Gianluca RossettiGeneral and Bariatric Surgery Unit, Abano Terme Policlinic, 35031 Padova, Italy.
Marcello OrioMedical and Diabetological Center CMSO, 84123 Salerno, Italy.
Luigi CobellisUnit of General Surgery, Casa Di Cura "Prof. Dott. Luigi Cobellis", 84078 Vallo Della Lucania, Italy.ORCID 0000-0001-5993-4770
Francesco CobellisUnit of General Surgery, Casa Di Cura "Prof. Dott. Luigi Cobellis", 84078 Vallo Della Lucania, Italy.
Vincenzo PilonePublic Health Department, University of Naples Federico II, 80131 Naples, Italy.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND/

objectivesTirzepatide (TZP), a dual glucose-dependent insulinotropic polypeptide and glucagon-like peptide-1 receptor agonist, induces substantial weight loss in patients with obesity; however, pharmacologically induced weight reduction may be accompanied by losses in fat-free mass (FFM), muscle strength (MS), and resting metabolic rate (RMR), potentially influencing metabolic health. The metabolic implications of short-term preservation of metabolically active tissue during TZP therapy remain incompletely characterized.

methodsWe performed a secondary, exploratory analysis of a previously published 12-week prospective, non-randomized comparative study including 60 patients with obesity treated with TZP (n = 30 TZP+Low Energy Ketogenic Therapy [LEKT]; n = 30 TZP+Low Calorie Diet [LCD]). Body weight (BW), fat mass (FM), FFM, MS, and RMR were assessed at baseline and week 12. Glycaemic parameters included fasting glucose, insulin, hemoglobin A1c (HbA1c), and HOMA-IR. All analyses were exploratory and hypothesis-generating.

resultsBoth groups achieved comparable reductions in BW after 12 weeks. FM decreased in both groups, while relative preservation of FFM, MS, and RMR was observed in one dietary context. Short-term changes in HbA1c, insulin, and HOMA-IR were statistically associated with concurrent changes in FFM, MS, and RMR, whereas no consistent associations were observed with changes in total BW or FM. Baseline glycaemic values were largely within the normoglycemic range.

conclusionsIn this short-term secondary exploratory analysis, preservation of metabolically active tissue during TZP therapy was associated with concurrent glycaemic profiles, whereas no consistent associations were observed with total weight loss magnitude. These findings do not imply causality and should be interpreted as hypothesis-generating, warranting confirmation in larger, randomized, long-term studies.

Indexed as

Blood GlucoseBody CompositionObesityTirzepatideAdultBiomarkersCaloric RestrictionFemaleGlycated HemoglobinHumansInsulinMaleMiddle AgedProspective StudiesWeight LossBiomarkersBlood GlucoseGlycated HemoglobinInsulinTirzepatidebody compositionexploratory analysisfat-free massglycaemic markersinsulin resistanceobesityresting metabolic ratetirzepatide

Identifiers

PMID41978142
PMCPMC13074557

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