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Key themes

Science Not Fiction — Evidence Saves Lives

Cancer Prevention Action Week 2026
15–21 June 2026

Close-up of hands using a mobile phone in low light, with the screen glowing brightly and fingers interacting with the device. The scene has a blue and purple lighting effect.

Health information is everywhere online. While much of it can be helpful, it is often over-simplified or taken out of context. When that happens, it becomes much harder to know what to trust.

For Cancer Prevention Action Week (CPAW) 2026 we are empowering people to look beyond these headlines and trust what the evidence really says – to choose science, not fiction.

As part of this year’s campaign, we’ve done a deep dive into misinformation and nutrition; carried out a nationwide analysis that will reveal the impact of misinformation on healthcare professionals and the general public; and developed a new and simple tool to help you navigate your way through misinformation.

CPAW 2026 — Key themes:

  • Do not rely on supplements for cancer prevention
  • Eat wholegrains, vegetables, fruit and beans
  • Limit alcohol consumption

Find out more

What’s the link to cancer?

Supplements

If you take supplements, such as a daily vitamin pill or dietary aids that claim to boost your immunity, read on

How to eat more

Fibre and wholegrains

Fibre can help protect against cancer but many of us don’t eat enough. Find out how to include more fibre in your diet

Get your 5 A DAY

Fruit and vegetables

Fruit and vegetables are an essential part of our daily diet, but what’s the evidence behind their impact on cancer?

Know your legumes

Pulses

Find out about pulses, beans, lentils and other legumes, and explore the evidence about pulses and cancer

Know the facts

Alcohol

Drinking alcohol increases your risk of 7 types of cancer, and our evidence shows that there is no safe level of drinking

Get regular updates

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TRUST Test
An illustrated person in glasses thinks with a WCRF TRUST Test speech bubble overhead, surrounded by thought bubbles featuring icons for caution, checklist, search, direction, and approval.

TRUST Test

A simple tool to help you quickly assess health claims, spot misinformation and make more informed decisions.

Polling
A person in a yellow shirt holds a clipboard and writes with a blue pen. The background is out of focus, suggesting an indoor setting during Cancer Prevention Action Week (CPAW) 2026.

Polling

We commissioned YouGov to research health misinformation, trust and cancer-prevention decision-making.

Campaign toolkit
Poster for World Cancer Research Fund’s Cancer Prevention Action Week 2026, featuring the slogan “Science Not Fiction” and promoting a campaign toolkit. Dates and web link are included at the bottom.

Campaign toolkit

Access campaign guidance, key messages, downloadable assets and resources to support CPAW 2026.

Access resources

Health professionals

Support your patients in navigating health information with confidence.

Partner with us

Corporate partnerships

Partner with us to ensure people are making informed decisions about their health.

Information and advice

Living with cancer

Advice on common side-effects of cancer and cancer treatment, how to eat well and your questions answered.