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Intragastric Balloon and Time-Restricted Eating for Weight Loss in Adults With Overweight or Obesity

7 de noviembre de 2026 actualizado por: Seher Şen, Mudanya University

Effects of Intragastric Balloon and Time-Restricted Intermittent Fasting Diet on Weight Loss and Metabolic Parameters in Adults With Overweight and Obesity

The goal of this non-randomized clinical study is to learn whether an intragastric balloon (IGB) and time-restricted eating (TRE; 16-hour daily fast with an 8-hour eating window), used alone or together, improve weight loss, body composition, and metabolic parameters in adults aged 18 to 65 years with overweight or obesity (body mass index 27.0 to 39.9 kg/m²). Participants are followed in four groups according to whether they have an IGB (placed as part of routine clinical care, not assigned by the study) and whether they choose to follow TRE: (1) standard nutrition therapy, (2) IGB plus standard nutrition therapy, (3) TRE plus standard nutrition therapy, and (4) IGB plus TRE plus standard nutrition therapy. All participants receive the same individualized energy-restricted diet, dietitian follow-up, behavioral education, and physical activity advice. Body weight and body composition are measured at baseline, 3 months, and 6 months; routine laboratory results are recorded at baseline and 6 months.

Descripción general del estudio

Estado

Reclutamiento

Condiciones

Intervención / Tratamiento

Descripción detallada

This is a prospective, single-center, non-randomized, exploratory (pilot) study with a 2×2 factorial structure. The two factors are intragastric balloon (IGB; present/absent) and time-restricted eating (TRE; yes/no). IGB placement is not a study procedure: it is performed as routine clinical care according to the physician's indication and the patient's preference, and the investigators have no role in that decision. TRE is offered in the dietetics outpatient clinic; participants who wish to follow it are allocated to the TRE groups, and those who do not are followed with standard nutrition therapy alone.

All groups receive the same frequency of dietitian visits, the same behavioral education, comparable energy targets, and the same physical activity advice (7,500 to 10,000 steps per day), so that groups differ only in IGB status and TRE. Body composition is measured by multi-frequency bioelectrical impedance analysis. Laboratory values are taken from routine clinical test results; no additional blood samples are drawn. Dietary intake is assessed with 3-day food records and physical activity with participants' smartphone step counters.

At least 15 participants per group (60 in total) are planned. Main and interaction effects of IGB and TRE will be analyzed with two-way analysis of variance or general linear models, and changes over time with repeated-measures analysis of variance or linear mixed models, adjusting for age, sex, baseline body mass index, comorbidities, physical activity, and energy intake.

Tipo de estudio

Intervencionista

Inscripción (Estimado)

60

Fase

  • No aplica

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Estudio Contacto

  • Nombre: Seher Şen, Assistant Professor
  • Número de teléfono: 05393919700
  • Correo electrónico: seherdalli@gmail.com

Ubicaciones de estudio

    • Yıldırım
      • Bursa, Yıldırım, Turquía (Türkiye)
        • Reclutamiento
        • Yıldırım Doruk Hastanesi
        • Contacto:
          • Yıldırım Doruk Hastanesi Seher ŞEN, Assistant Professor
          • Número de teléfono: 05393919700
          • Correo electrónico: seher.sen@mudanya.edu.tr

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

18 años a 65 años (Adulto, Adulto Mayor)

Acepta Voluntarios Saludables

No

Géneros elegibles para el estudio

Todos

Descripción

Inclusion Criteria:

  • Age 18 to 65 years
  • Body mass index (BMI) 27.0 to 39.9 kg/m²; for BMI 27.0 to 29.9 kg/m², at least one obesity-related comorbidity (e.g., insulin resistance, type 2 diabetes mellitus, hypertension, dyslipidemia)
  • BMI of 27 kg/m² or higher for at least 2 years
  • History of unsuccessful non-surgical weight-loss attempts
  • Willingness to participate and written informed consent

Exclusion Criteria:

  • Inflammatory bowel disease or other inflammatory conditions of the gastrointestinal tract (including esophagitis and hiatal hernia of 2 cm or larger)
  • Previous gastrointestinal surgery
  • History of upper gastrointestinal bleeding
  • Gastroparesis
  • Severe psychiatric illness
  • Active malignancy
  • Pregnancy or breastfeeding
  • Alcohol or substance dependence
  • Physical limitation preventing exercise
  • Contraindication to intragastric balloon placement

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Tratamiento
  • Asignación: No aleatorizado
  • Modelo Intervencionista: Asignación factorial
  • Enmascaramiento: Ninguno (etiqueta abierta)

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Comparador activo: Standard Nutrition Therapy

Participants without an intragastric balloon who receive standard energy-restricted nutrition therapy only.

Individualized balanced diet with approximately 25% energy restriction from the estimated daily energy requirement (typically 1000 to 1400 kcal/day; protein 1.0 to 1.5 g/kg/day, carbohydrate 35 to 50% and fat 25 to 35% of energy), with regular dietitian follow-up, behavioral education, and advice to walk 7,500 to 10,000 steps per day.

Comparador activo: IGB + Standard Nutrition Therapy

Participants with an intragastric balloon (IGB) placed as part of routine clinical care who receive standard energy-restricted nutrition therapy.

Individualized balanced diet with approximately 25% energy restriction from the estimated daily energy requirement (typically 1000 to 1400 kcal/day; protein 1.0 to 1.5 g/kg/day, carbohydrate 35 to 50% and fat 25 to 35% of energy), with regular dietitian follow-up, behavioral education, and advice to walk 7,500 to 10,000 steps per day.

Endoscopically placed intragastric balloon, performed as part of routine clinical care based on physician indication and patient preference; placement is not assigned by the study. Diet after placement progresses through clear liquid, full liquid, pureed, and solid stages according to routine clinical practice.

Experimental: TRE + Standard Nutrition Therapy

Participants without an intragastric balloon who follow time-restricted eating (TRE; 16-hour daily fast, 8-hour eating window) in addition to standard energy-restricted nutrition therapy.

Individualized balanced diet with approximately 25% energy restriction from the estimated daily energy requirement (typically 1000 to 1400 kcal/day; protein 1.0 to 1.5 g/kg/day, carbohydrate 35 to 50% and fat 25 to 35% of energy), with regular dietitian follow-up, behavioral education, and advice to walk 7,500 to 10,000 steps per day.

Daily food intake limited to an 8-hour eating window with a 16-hour fast. The recommended fasting period is 18:00 to 10:00; alternative 16-hour periods (such as 19:00 to 11:00 or 20:00 to 12:00) are allowed. Water and non-caloric beverages are permitted during the fasting period. Energy and macronutrient targets are identical to standard nutrition therapy. Duration: 6 weeks.

Experimental: IGB + TRE + Standard Nutrition Therapy

Participants with an intragastric balloon (IGB) placed as part of routine clinical care who follow time-restricted eating (TRE; 16-hour daily fast, 8-hour eating window) in addition to standard energy-restricted nutrition therapy.

Individualized balanced diet with approximately 25% energy restriction from the estimated daily energy requirement (typically 1000 to 1400 kcal/day; protein 1.0 to 1.5 g/kg/day, carbohydrate 35 to 50% and fat 25 to 35% of energy), with regular dietitian follow-up, behavioral education, and advice to walk 7,500 to 10,000 steps per day.

Endoscopically placed intragastric balloon, performed as part of routine clinical care based on physician indication and patient preference; placement is not assigned by the study. Diet after placement progresses through clear liquid, full liquid, pureed, and solid stages according to routine clinical practice.

Daily food intake limited to an 8-hour eating window with a 16-hour fast. The recommended fasting period is 18:00 to 10:00; alternative 16-hour periods (such as 19:00 to 11:00 or 20:00 to 12:00) are allowed. Water and non-caloric beverages are permitted during the fasting period. Energy and macronutrient targets are identical to standard nutrition therapy. Duration: 6 weeks.

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Body weight
Periodo de tiempo: Baseline, Month 3, Month 6

Kilograms, measured in light clothing without shoes (Tanita MC-780 MA)

Baseline, Month 3, Month 6
Body mass index
Periodo de tiempo: Baseline, Month 3, Month 6

Weight and height combined to report BMI in kg/m²

Baseline, Month 3, Month 6
Percent total weight loss
Periodo de tiempo: Month 3, Month 6

(Baseline weight - follow-up weight) / baseline weight × 100.

Month 3, Month 6
Percent excess weight loss
Periodo de tiempo: Month 3, Month 6

(Baseline weight - follow-up weight) / (baseline weight - ideal weight) × 100; ideal weight at BMI 25 kg/m².

Month 3, Month 6
Fat mass
Periodo de tiempo: Baseline, Month 3, Month 6

Kilograms, by multi-frequency bioelectrical impedance analysis

Baseline, Month 3, Month 6
Body fat percentage
Periodo de tiempo: Baseline, Month 3, Month 6

Percent of body weight, by bioelectrical impedance analysis

Baseline, Month 3, Month 6
Muscle mass percentage
Periodo de tiempo: Baseline, Month 3, Month 6

Percent of body weight, by bioelectrical impedance analysis

Baseline, Month 3, Month 6
Muscle mass
Periodo de tiempo: Baseline, Month 3, Month 6

Kilograms, by bioelectrical impedance analysis

Baseline, Month 3, Month 6

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Fasting plasma glucose
Periodo de tiempo: Baseline, Month 6

Concentration in mg/dL from routine clinical laboratory results

Baseline, Month 6
fasting insulin (µIU/mL)
Periodo de tiempo: Baseline, Month 6

Fasting serum insulin concentration in µIU/mL, obtained from routine clinical laboratory results.

Baseline, Month 6
Glycated Hemoglobin (HbA1c)
Periodo de tiempo: Baseline, Month 6

Glycated hemoglobin (HbA1c) as a percentage of total hemoglobin, obtained from routine clinical laboratory results.

Baseline, Month 6
Total Cholesterol
Periodo de tiempo: Baseline and Month 6

Serum total cholesterol concentration in mg/dL, obtained from routine clinical laboratory results.

Baseline and Month 6
High-Density Lipoprotein (HDL) Cholesterol
Periodo de tiempo: Baseline and Month 6

Serum HDL cholesterol concentration in mg/dL, obtained from routine clinical laboratory results.

Baseline and Month 6
Triglycerides
Periodo de tiempo: Baseline and Month 6

Serum triglyceride concentration in mg/dL, obtained from routine clinical laboratory results.

Baseline and Month 6
Alanine Aminotransferase (ALT)
Periodo de tiempo: Baseline and Month 6

Serum ALT activity in U/L, obtained from routine clinical laboratory results

Baseline and Month 6
Aspartate Aminotransferase (AST)
Periodo de tiempo: Baseline and Month 6

Serum AST activity in U/L, obtained from routine clinical laboratory results.

Baseline and Month 6
Serum Iron
Periodo de tiempo: Baseline and Month 6

Serum iron concentration in µg/dL, obtained from routine clinical laboratory results.

Baseline and Month 6
Ferritin
Periodo de tiempo: Baseline and Month 6

Serum ferritin concentration in ng/mL, obtained from routine clinical laboratory results.

Baseline and Month 6
Vitamin B12
Periodo de tiempo: Baseline and Month 6

Serum vitamin B12 concentration in pg/mL, obtained from routine clinical laboratory results.

Baseline and Month 6
Folate
Periodo de tiempo: Baseline and Month 6

Serum folate concentration in ng/mL, obtained from routine clinical laboratory results.

Baseline and Month 6
Sodium
Periodo de tiempo: Baseline and Month 6

Serum sodium concentration in mmol/L, obtained from routine clinical laboratory results.

Baseline and Month 6
Potassium
Periodo de tiempo: Baseline and Month 6

Serum potassium concentration in mmol/L, obtained from routine clinical laboratory results.

Baseline and Month 6
Daily energy intake
Periodo de tiempo: Baseline and Month 6

Mean daily energy intake in kcal/day, calculated from a 3-day food record.

Baseline and Month 6
Daily Protein Intake
Periodo de tiempo: Baseline and Month 6

Mean daily protein intake in g/day, calculated from a 3-day food record.

Baseline and Month 6
Daily Carbohydrate Intake
Periodo de tiempo: Baseline and Month 6

Mean daily carbohydrate intake in g/day, calculated from a 3-day food record.

Baseline and Month 6
Daily Fat Intake
Periodo de tiempo: Baseline and Month 6

Mean daily fat intake in g/day, calculated from a 3-day food record.

Baseline and Month 6
Daily Step Count
Periodo de tiempo: Baseline and Month 6

Mean number of steps per day, reported by participants from their smartphone step counter.

Baseline and Month 6

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Actual)

12 de mayo de 2026

Finalización primaria (Estimado)

15 de noviembre de 2026

Finalización del estudio (Estimado)

1 de diciembre de 2026

Fechas de registro del estudio

Enviado por primera vez

7 de noviembre de 2026

Primero enviado que cumplió con los criterios de control de calidad

7 de noviembre de 2026

Publicado por primera vez (Actual)

13 de noviembre de 2026

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

13 de noviembre de 2026

Última actualización enviada que cumplió con los criterios de control de calidad

7 de noviembre de 2026

Última verificación

1 de noviembre de 2026

Más información

Términos relacionados con este estudio

Otros números de identificación del estudio

  • MUDU-SBE-SS-06

Plan de datos de participantes individuales (IPD)

¿Planea compartir datos de participantes individuales (IPD)?

NO

Descripción del plan IPD

In accordance with the study protocol approved by the ethics committee and national data protection legislation (Law No. 6698 on the Protection of Personal Data), individual participant data will be accessible only to the research team and will not be shared with third parties. Aggregate results will be published in peer-reviewed journals.

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

No

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

No

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .