Cold and Flu Relief


If so, you could help research a natural, non-pharmaceutical product in a medical study to investigate relief from Cold and Flu-like symptoms.

Check your eligibility here

Do you usually experience a cold or flu during the year?

Thank you for your interest in RDC Clinical’s new study, into the effectiveness of an olive leaf extract which has been standardised for Elenolic acid (ELA). Olive leaf extract has been shown to have antimicrobial and antiviral properties. This study is examining the potential effect on reducing cold and flu symptoms (such as congestion, sore throat, fever, aches and pains).

Your next cold or flu could help medical research.

So that we can scientifically measure the effectiveness of the extract, you would be required to take your allocated Study Product capsules over a 2-week period during a cold or flu event. You would also need to rate your cold and flu symptoms daily during your illness.

If you’d like to take part in this study, we’d love your help. More information is below, the registration of interest form is on this page.

About the product you’ll help test… a natural supplement for cold and flu relief.

Elenolic acid (ELA) is derived from oleuropein extracted from olive oil and olive leaves. It has been shown to have antimicrobial and antiviral properties against the influenza virus. 

This study is examining the effects of ELA for specifically reducing cold and flu symptoms in healthy adults. The product is supplied in capsule form and is taken daily during your cold or flu.

About the study you’ll take part in… cold and flu relief.
The study will involve approximately 200 men & women who experience cold and flu symptoms (such as congestion, sore throat, fever, aches and pains). Each participant will take the Study Product (provided in capsules) for a 2-week period once cold or flu symptoms begin.

This study is a placebo-controlled trial which means that we will be comparing the effectiveness of the Active product to a placebo. In this study, 50% of participants will receive the Active product and 50% will receive the Placebo.

Once enrolled in the study, you will be allocated to either the Active product group (Olive Leaf Extract), or the Placebo group. This is the product you will take during your next cold/flu event, and will be posted to you.

Once you begin to experience your next cold or flu, you will be required to start taking your allocated Study Product, and to rate the severity of your symptoms until you return to normal health, or up to a maximum of 2 weeks.

The information we collect during the study will enable the investigators to assess the product’s effectiveness.


You will be eligible to be reimbursed to cover some of your time and any out of pocket expenses. The reimbursement will be made via direct deposit to your nominated bank account once all study requirements (up to 4 month participation) have been met.

If participation from the study is withdrawn prior to the completion, you will be eligible for reimbursement of any expenses incurred during your participation. There is no cost to be a voluntary participant in this study, all study materials and tests are paid for by the investigators. All products/items will be supplied and posted at the expense of RDC Clinical, and where required, pre-paid satchels provided for the return of any item.

If you experience regular cold and flu episodes, aged between 18-65 and would like to help, we’d love to hear from you. Please register your interest by answering the questionnaire and completing the form on this page… we’ll then get in touch to screen you for suitability.

Could your next cold or flu help research? Check if you can register to take part…

Are you…

  • Adult, aged between 18-65?
  • Usually experiencing more than 2 colds per year?
  • A non-smoker?
  • BMI under 40

Please register your interest by answering the questionnaire and completing the form on this page, we’ll then get in touch to screen you for suitability.

Ethics approval & privacy… you’ll be in safe, professional hands.

This RDC Clinical study has been approved by the Bellberry Human Research Ethics Committee under Approval Number: 2019-06-483. The study is also registered on the Australian and New Zealand Clinical Trial Registry under Registration Number: ACTRN12619001722189.

Trained Trial Co-ordinators will supervise your progress throughout the study. Your results will be made available to you at the conclusion of the study. Any of your personal information collected during the study will be kept in the strictest confidence.

You can complete the study at home, there are no in-clinic visits required.

This study requires that you log your cold and flu symptom severity daily online. This means that there is no requirement for in-clinic visits. Simply fill in the online form via a link that will be provided to you after your enrolment.

To complete the study, you will need access to the internet. The online forms can be completed on phone, tablet or computer.