Table 1 Inclusion and exclusion criteria

Adults, age ≥ 18

Age < 18

Minimum 12 weeks post-surgery and/or active treatment

Less than 12 weeks post-surgery or active treatment

Completed all active anti-cancer treatments, including surgery, radiotherapy or chemotherapy

Receiving treatment for malignancy, secondary malignancy

No serious health complications

Short bowel syndrome, Crohn’s disease, ulcerative colitis, diverticulitis or jejunostomy, previous stroke, congested cardiac failure or oedema, hepatic or renal failure

No specific dietary requirements

On any therapeutic diets, multiple food intolerances or allergies

Body Mass Index ≥ 20 kg/m²

Body Mass Index < 20 kg/m²

Unintentional weight loss ≤ 5% in the previous 3–6 months

Unintentional weight loss >5% in the previous 3–6 months

Following < 4 of the WCRF/AICR recommendations

Already following ≥ 4 WCRF/AICR recommendations

Ability to work with computer, smart phone or tablet

Inability to work with computer, smart phone or tablet

Ability to give informed consent

Inability to give informed consent