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

Recruiting now · Phase 4 · Has a placebo group

Conditions studied: Exercise

In brief

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.

Key facts

Study ID

NCT07434752

Run by

RDC Clinical Pty Ltd

People needed

40

Starts

2026-03-26

Expected to finish

2026-12-01

Last updated by the study team

2026-04-16

Who can join

Age: 18 and older, up to 45. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Passing the Exercise and Sport Science Australia adult pre-exercise screening system (APSS) stage 1 \& 2 (see appendix 4).
• Between the ages of 18 and 45,
• Not sedentary, and not completing more than 150 minutes of low and/or moderate and/or or vigorous intensity endurance exercise a week,
• Ability to commit to in principle fulfilment of all 3 trial visits,
• No history of coagulopathy e.g., DVT, stroke,
• No known heart disease,
• No known pancreatic insufficiency,
• No known inflammatory bowel disease, or prior bowel resection or bypass surgery (excluding gastric banding and sleeve),
• BMI of 22.0 to 34.9 kg/m2,
• No known allergies to caffeine or green tea extract,
• No known type I or II diabetes,
• No uncontrolled concurrent illness,
• No known current pregnancy or breastfeeding women
• No current regular consumption of supplements (>2 times a week) or foods and drinks containing caffeine and/or green tea extracts (>2 times per day, weekly).
• Agree not to consume caffeine for 12-hours prior to the clinic visit.

You may not qualify if…

• Triggering any of the exclusion screening criteria as outlined below, and in compliment with the Exercise and Sport Science Australia adult pre-exercise screening system (APSS).
• Under the age of 18 or over the age of 45,
• Sedentary, or completing over 150 minutes of low and/or moderate and/or or vigorous intensity endurance exercise a week,
• Inability to commit to in principle fulfilment of all 3 trial visits,
• History of coagulopathy e.g., DVT, stroke,
• Known heart disease,
• Known pancreatic insufficiency,
• Known inflammatory bowel disease, or prior bowel resection or bypass surgery (excluding gastric banding and sleeve),
• BMI < 22.0 or > 34.9 kg/m2,
• Known allergies to caffeine or green tea extract,
• Known type I or II diabetes,
• Uncontrolled concurrent illness,
• Taking GLP-1 agonists, caffeine, or any other medication known to affect metabolism.
• Known current pregnancy or breastfeeding women.
• Currently regularly consuming supplements, foods or drinks containing a caffeine and green tea extract blend, or not willing to abstain for the study

Where it is running

• Griffith University, Gold Coast Campus — Southport, Queensland, Australia (enrolling)

Full record on ClinicalTrials.gov

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