Planet-friendly diet reduces risk of dying after cancer diagnosis 

Research funded by World Cancer Research Fund has shown that people living with cancer who closely follow a sustainable and nutritious diet – the EAT-Lancet reference diet – have a lower risk of dying from cancer and from all causes.

This is the first study to look at the impact of the EAT-Lancet diet on people living with or beyond cancer – as opposed to the general population. Prof Sabine Rohrmann and her team at the University of Zurich, in collaboration with colleagues from another Swiss university, the UK and Austria, used UK Biobank data to see if closely following this diet – with its emphasis on eating a rich variety of plant foods – affected the risk of death for people with a cancer diagnosis at the time they were recruited for the study.

Studying more than 25,000 people with an average age of 60 years at recruitment, the researchers used dietary information collected in the UK Biobank to develop a score that reflected how closely participants followed the EAT-Lancet diet.

More support needed for people facing cancer

Of the 25,348 cancer survivors in the group studied, 4,781 people died during the study follow-up. Prof Rohrmann’s results showed modest links between closely following the diet and a lower risk of dying from cancer, and of dying from all causes. The researchers didn’t observe a link between the diet and dying from heart disease.

Almost 64% of the participants were female, and participants who followed the EAT-Lancet diet more closely were more likely to be female. However, this study confirmed previous evidence showing that people living with and beyond cancer do not tend to follow healthy diets after their diagnosis. This emphasises the need to help people form healthier habits and overcome the barriers to eating well, such as treatment side-effects affecting appetite and taste.

These findings highlight the importance of greater nutrition support and guidance for people facing cancer. Guidelines aimed at the general population are unlikely to consider the needs of people living with and beyond cancer. With a lack of evidence-based recommendations for this population, the gap can sometimes be filled by practices not supported by the science – such as excessive use of dietary supplements.

This evidence showing the benefits of the EAT-Lancet diet follows recent research by our Global Cancer Update Programme, which provided guidance for people with a breast or a bowel cancer diagnosis.