Participate in a meal-test challenge to assess the efficacy of a plant-based tonic drink

Are you interested in understanding your glucose and insulin responses to a test meal? Would you like to help us test if a plant-based tonic drink can lower these responses?

Natural plant sourced extracts, which possess bioactive compounds (such as polyphenols, flavonoids, alkaloids, and saponins) can exhibit glucose lowering effects by increasing insulin sensitivity, promoting glucose uptake from the blood into the tissue and reducing oxidative stress. Using a commercially available plant-based tonic, we are aiming to investigate the effects of the tonic drink consumed with a breakfast test meal on blood glucose and insulin concentrations.

• This study requires three-to-five in-person visits to the Fitzroy laboratory
• Total participation is ~9 hours over 3-4 weeks

All participants will receive:

• Personalised meal test results
• Use of a continuous glucose monitor for two weeks (with individual report)
• Gift card as a thanks for participation

To be eligible for this study you must:

• Be aged 30 to 64 years old
• Have a BMI >27 kg/m2 (i.e. categorised as overweight or above)
• Willing to consume standardised meals and have blood sampled

To read the Participant Information Letter and find out if you are eligible, please complete the screening questionnaire at https://redcap.link/MTT.

For more information, please contact Dr Evelyn Parr via email evelyn.parr@acu.edu.au or phone 03 9230 8278.

This study has been approved by the ACU Human Research Ethics Committee (2025-4390HC).