The World Cancer Research Fund carried out the largest ever inquiry into lifestyle and cancer, and issued several stark recommendations. They include not gaining weight as an adult, avoiding sugary drinks and alcohol, and not eating bacon or ham.

Everyone must also aim to be as thin as possible without becoming underweight. People with a Body Mass Index (BMI), a calculation which takes into account height and weight, of between 18.5 and 25, are deemed to be within a “healthy” weight range. But the study says their risk increases as they head towards the 25 mark, and that everyone should try to be as close to the lower end as possible.

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