EAT-FIBRE STUDY

Are you an identical twin pair aged 18 or over living in the UK?

Are you an identical twin pair aged 18 or over living in the UK?

Researchers at TwinsUK, a world-leading twin research programme, are investigating whether diet can help protect against early-onset bowel cancer.

Bowel cancer in people under 50 is rising. Diet may be key, and twin research can tell us why. This study will help us understand how the foods you eat shape your gut health and cancer risk.

If you're interested in taking part, click below to register your interest.

This research is part of PROSPECT, a £20m cancer research programme at King's College London, in collaboration with Harvard University.

Who can take part?

Who can take part?

You may be eligible to take part if you:

Are an identical twin pair aged 18 or over

Are based in the UK

Are able to attend two mandatory clinic visits at our London clinic, 3 months apart (travel expenses covered)

Are willing to follow a set diet for 3 months

Interested ? Click below to get started!

Study timeline

Study timeline

To participate in EAT-FIBRE, both you and your twin will need to sign up to TwinsUK.

Registration form

Click the “Sign up” button to fill out a quick registration form

Both you and your twin will need to complete individual forms to proceed

Consent form

You will receive an email from TwinsUK@kcl.ac.uk with an information sheet and a consent form to e-sign; please keep an eye out in your junk folder

Both you and your twin will need to e-sign the consent form to proceed with enrolment

Start of study

Clinic visit at TwinsUK St Thomas’s Hospital London

Health checks, samples (blood, stool, urine, saliva and cheek swab), health and lifestyle questionnaires

During the study

Weekly questionnaire on your digestive health, food diaries, receive 1:1 support from a dietitian, and free supermarket deliveries

Mid-study

Collecting and mailing samples in pre-paid packaging

End of study

Clinic visit at TwinsUK St Thomas’s Hospital London
Health checks, samples (blood, stool, urine, saliva and cheek swab), health and lifestyle questionnaires

Take part in our research

Take part in our research

Twins are uniquely valuable for this kind of research, and your participation could directly shape future dietary recommendations for bowel cancer prevention.

If you're interested in taking part, click below to get started.

Twins are uniquely valuable for this kind of research, and your participation could directly shape future dietary recommendations for bowel cancer prevention.

If you're interested in taking part, click below to get started.

This study has been reviewed and approved by the relevant ethics authorities (IRAS: 342169). Conducted by TwinsUK at King's College London.


This study has been reviewed and approved by the relevant ethics authorities (IRAS: 342169). Conducted by TwinsUK at King's College London.


All rights reserved. Copyright 2026.

All rights reserved. Copyright 2026.