Abstract: Introduction: Recent studies have demonstrated that both oral semaglutide and sodium-glucose cotransporter 2 inhibitors (SGLT2is) have beneficial effects on glycemic and weight management as well as providing renal and cardiovascular protection. However, direct comparisons of the effects of these two drugs in clinical practice remain limited.
Materials and Methods: This study is a single-center, retrospective, observational study. Patients with type 2 diabetes who were initiated on oral semaglutide or SGLT2is and continued treatment for 6 months or more were retrospectively analyzed and compared.
Results: The semaglutide group (84 patients) and the SGLT2is group (231 patients) showed similar, significant reductions in glycated hemoglobin (HbA1c) (semaglutide: -0.88 ± 0.14%; P < 0.01, and SGLT2is: -0.86 ± 0.06%; P < 0.01, at 6 months), body weight (semaglutide: -2.58 ± 0.37 kg; P < 0.01, and SGLT2is: -2.30 ± 0.18 kg; P < 0.01, at 6 months), and fat mass (semaglutide: -2.20 ± 0.50 kg; P < 0.01, and SGLT2is: -1.93 ± 0.44 kg; P < 0.01, at 6 months), being decreased similarly and significantly in both groups. On the other hand, there was a significant reduction in skeletal muscle mass only in the SGLT2is group (semaglutide: -0.10 ± 0.30 kg; P = 0.74, and SGLT2is: -0.40 ± 0.14 kg; P < 0.01 at 6 months).
Conclusions: While both drugs elicited comparable effects on glycemic management and body weight reduction in patients with type 2 diabetes, caution is needed when using SGLT2is in patients at potential risk for sarcopenia, as they may lead to less favorable changes in skeletal muscle mass compared to oral semaglutide.
(© 2026 The Author(s). Journal of Diabetes Investigation published by Asian Association for the Study of Diabetes (AASD) and John Wiley & Sons Australia, Ltd.)
References: Mesinovic J, Zengin A, De Courten B, et al. Sarcopenia and type 2 diabetes mellitus: A bidirectional relationship. Diabetes Metab Syndr Obes 2019; 12: 1057–1072.
Rodbard HW, Rosenstock J, Canani LH, et al. Oral Semaglutide versus empagliflozin in patients with type 2 diabetes uncontrolled on metformin: The PIONEER 2 trial. Diabetes Care 2019; 42: 2272–2281.
Yabe D, Hamamoto Y, Kawanami D, et al. PIONEER REAL Japan: Primary results from a multicenter, prospective, real‐world study of oral semaglutide in adults with type 2 diabetes in Japanese clinical practice. J Diabetes Investig 2024; 11: 1566–1577.
Ishiguro M, Nishimura R. The impact of oral semaglutide on glycemic control and weight reduction: A database analysis of dosing effects in Japanese individuals with type 2 diabetes. Front Endocrinol (Lausanne) 2025; 16: 1615516.
Yamada Y, Yabe D, Hertz CL, et al. Efficacy and safety of oral semaglutide by baseline age in Japanese patients with type 2 diabetes: A subgroup analysis of the PIONEER 9 and 10 Japan trials. Diabetes Obes Metab 2021; 24: 321–326.
Seino S. Cell signalling in insulin secretion: The molecular targets of ATP, cAMP and sulfonylurea. Diabetologia 2012; 55: 2096–2108.
Drucker DJ. GLP‐1 physiology informs the pharmacotherapy of obesity. Mol Metab 2022; 57: 101351.
Fujita Y, Inagaki N. Renal sodium glucose cotransporter 2 inhibitors as a novel therapeutic approach to treatment of type 2 diabetes: Clinical data and mechanism of action. J Diabetes Investig 2014; 5: 265–275.
Uchiyama S, Sada Y, Mihara S, et al. Oral Semaglutide induces loss of body fat mass without affecting muscle mass in patients with type 2 diabetes. J Clin Med Res 2023; 15: 377–383.
Volpe S, Lisco G, Fanelli M, et al. Oral semaglutide improves body composition and preserves lean mass in patients with type 2 diabetes: A 26‐week prospective real‐life study. Front Endocrinol 2023; 14: 1240263.
Abdulla H, Phillips B, Smith K, et al. Physiological mechanisms of action of incretin and insulin in regulating skeletal muscle metabolism. Curr Diabetes Rev 2014; 10: 327–335.
Yabe D, Nishikino R, Kaneko M, et al. Short‐term impacts of sodium/glucose co‐transporter 2 inhibitors in Japanese clinical practice: Considerations for their appropriate use to avoid serious adverse events. Expert Opin Drug Saf 2015; 14: 795–800.
Pan R, Zhang Y, Wang R, et al. Effect of SGLT‐2 inhibitors on body composition in patients with type 2 diabetes mellitus: A meta‐analysis of randomized controlled trials. PLoS One 2022; 17: e0279889.
No Comments.