Diagnosis of stage III or IV colorectal or non-small cell lung cancer
Scheduled for the first cycle of any line of a systemic treatment: chemotherapy, concurrent chemoradiotherapy, immunotherapy or targeted treatment with a planned duration of at least 9 weeks
Performance status Eastern Cooperative Oncology Group (ECOG) score 0 or 1
Age ≥ 18 years
You may not be if
Weight loss \>10% in the last 6 months
Body Mass Index \> 30.0 kg/m2
Life expectancy \< 3 months
Receiving enteral (tube) or parenteral nutrition
Presence of ileostoma or ileal pouch (except for an ileostomy at or near the terminal ileum which does not affect absorption of nutrients other than sodium, potassium, and water, in the opinion of the investigator)
Allergy to cow's milk protein, soy or fish, requiring a fibre-free diet or suffering galactosemia or lactose intolerance
Known pregnancy or lactation
Current alcohol or drug abuse in the opinion of the investigator
Wearing an electronic implant and/or pacemaker
Investigator's uncertainty about the willingness or ability of the subject to comply with the protocol requirements
Participation in any other studies involving investigational or marketed products concomitantly or within 14 days prior to entry into the study
