Effects of caffeine intake on body composition changes in obese people with intermittent fasting

Status

Active, not recruiting

Phases

Phase 2

Study type

Interventional

Source

TCTR

Registry ID

TCTR20230406001

Enrollment

110

Registered

2023-04-06

Start date

2023-08-17

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Obese people with intermittent fasting coffee, caffeine, intermittent fasting, obese people, body composition

Interventions

1. In the arm of intermittent fasting with caffeinated coffee, the participants are going to be taken history, physical examination, including vital signs, body weight, height, waist circumference and

Experimental Dietary Supplement,Placebo Comparator Dietary Supplement

Intermittent fasting with caffeinated coffee,Intermittent fasting with decaffeinated coffee

Eligibility

Sex/Gender

All

Age

18 Years to 60 Years

Inclusion criteria

Inclusion criteria: 1. Person who is 18 - 60 years old. 2. BMI is greater than or equal to 25.0 kg/m2. 3. Body weight has been constant for 6 months before the study is start. (Weight change is less than 5 kg.)

Exclusion criteria

Exclusion criteria: 1. Smoker 2. Pregnancy or breastfeeding 3. Chronic disease or Metabolic disease e.g. cardiovascular disease, arrhythmia, neurovascular disease, chronic kidney disease, chronic liver disease, diabetes, thyroid disease, epilepsy. 4. Psychiatric Disorders or Anxiety Disorders 5. Gastroesophageal reflux disease 6. Drug associated weight change e.g. SSRIs, Beta blockers, Corticosteroids 7. Drug interaction with caffeine e.g. MAOIs, Antibiotics, Bronchodilators 8. History of caffeine or coffee allergy 9. The research participant is unable to follow the instructions or not willing to participate the research.

Design outcomes

Primary

Measure	Time frame
Body composition at 4 weeks and 8 weeks after start of intervention Percentage of fat mass and fat-free mass,Body weight at 4 weeks and 8 weeks after start of intervention Percent weight change	—

Secondary

Measure	Time frame
Side effects of caffeinated and decaffeinated coffee at 4 weeks and 8 weeks after start of intervention History taking and 3-day dietary recall	—

Countries

Thailand

Contacts

Public ContactMr.Krittapas Paiboonrattanakorn

Department of Medicine, Faculty of medicine Ramathibodi hospital, Mahidol university

krittapas.pai@student.mahidol.ac.th0952545195

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026