NCT07434752

A Study to See if an Energy Drink With Caffeine and Green Tea Increases Fat Burning When Exercising

Influence of Caffeine and Green Tea Extracts Consumption on Basal, Peri- and Post-exercise Fat Oxidation

• Status: Recruiting
• Phase: Phase 4
• Study type: Interventional
• Enrollment: 40 (estimated)
• Sponsor: RDC Clinical Pty Ltd · Industry
• Sex: All
• Age: 18 Years – 45 Years
• Healthy volunteers: Accepted

Summary

The goal of this study is to evaluate the influence of consuming a drink containing a combination of caffeine and green tea extracts on fat oxidation responses at rest, during and after a period of endurance type exercise.

Detailed description

This study investigates whether consuming an energy drink containing caffeine and green tea extract before exercise increases fat burning (oxidation) compared with a placebo drink. Healthy, moderately active adults will attend three visits at clinic over 3-5 weeks. The first visit determines each participant's individual exercise intensity that maximises fat use during cycling. At two subsequent visits, participants will consume either the active drink or a placebo before completing a 30-minute cycling session at their personalised intensity. Fat and carbohydrate use, heart rate, blood pressure, and subjective responses will be measured at rest, during exercise, and after exercise using a double-blind, crossover design.

Conditions

• Exercise

Interventions

Type	Name	Description
DIETARY_SUPPLEMENT	Active (Green tea and caffeine)	Two 355 mL cans of "XS Energy + BURN" drink containing caffeine and green tea extract.
OTHER	Placebo	Two 355 mL cans of placebo drink but without the active ingredients (caffeine and green tea extract).

Timeline

• Start date: 2026-03-26
• Primary completion: 2026-12-01
• Completion: 2026-12-01
• First posted: 2026-02-27
• Last updated: 2026-04-16

Locations

1 site across 1 country: Australia