OnCo
ideasIdea

Ask about diet at diagnosis, and prebunk the myths before the internet does

Almost every newly diagnosed patient searches for what to eat and finds sugar-starvation, alkaline and juice-cure claims. If the oncology team asks about diet first and hands over good information, the myths have less room.

Patients report that clinicians rarely discuss diet, so they turn to social media and supplement marketing, where unproven claims dominate. Prebunking, warning people about a specific manipulation before they encounter it, has randomised evidence from misinformation research and from HPV vaccination. A short, structured diet and supplement conversation at the first oncology visit, with a dietitian-authored handout that names and explains the common myths and offers what is actually supported (fibre, protein, activity, alcohol, smoking), could be tested cheaply.

Hypothesis
A five-minute structured diet conversation plus prebunking materials at the first oncology consultation reduces adoption of unproven diets and antioxidant supplements at three months by half and increases dietitian referral uptake, without increasing anxiety.
Rationale
Misinformation fills a vacuum; the evidence that patients want diet advice and do not get it is consistent; prebunking is cheap and has experimental support. Dietitian referral is the constructive alternative.
What would test it
Cluster-randomised trial across oncology clinics with patient-reported diet and supplement behaviours at 3 and 6 months, belief in specific myths, anxiety and dietitian referral rates as endpoints.
Maturity
speculative
Who has to act
clinic
Cost to try
Small (under $1M)
Years to first evidence
2
Bottlenecks it attacks

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