Energy balance

In advanced solid tumor cancer patients, weight loss is driven primarily by elevated resting energy expenditure (hypermetabolism) rather than reduced dietary intake, as energy intake does not increase to compensate for higher metabolic rates.

For cancer patients with solid tumors, simply encouraging them to eat more may fail because their bodies are burning energy at an abnormally high rate (hypermetabolism) that standard intake cannot match. The focus should be on managing metabolic expenditure or providing high-density nutritional support that exceeds this elevated baseline, rather than assuming the patient is simply refusing to eat.