Living Well During Cancer Treatment

Pembrolizumab differs from chemotherapy in important ways - and one of those differences is that many patients maintain a good quality of life during treatment. For patients who feel well enough, engaging with the pillars of general health during treatment can support both wellbeing and, in some evidence, treatment outcomes.

Nutrition

There is no specific diet that enhances pembrolizumab's efficacy - claims to the contrary are not supported by robust evidence. What does matter is avoiding significant nutritional deficiency, which can worsen fatigue and impair overall function. A balanced diet rich in vegetables, whole grains, and adequate protein supports physiological resilience. If you have cancer-related appetite loss, nausea, or eating difficulties, a referral to a dietitian with oncology experience is worth discussing with your clinical team.

One specific consideration: some supplements - particularly high-dose antioxidants - may theoretically interfere with immune activity. Discuss any supplements you take with your oncologist before continuing them.

Physical activity

The evidence for exercise during cancer treatment has grown substantially. For patients with adequate performance status, moderate aerobic exercise (30 minutes most days) and resistance training are associated with reduced fatigue, improved mood, better sleep, and maintained muscle mass. The key word is moderate - this is not the time for intensive training. Listen to your body and adjust activity levels to how you feel each day. Cancer rehabilitation services can provide structured, safe exercise guidance during treatment.

Sleep

Fatigue is common during immunotherapy, and poor sleep compounds it. Good sleep hygiene - consistent sleep and wake times, limiting screens before bed, a cool dark room - supports sleep quality. If fatigue or sleep problems are significantly affecting your quality of life, this is worth raising with your clinical team, as there are targeted interventions that can help.

Emotional wellbeing

A cancer diagnosis and its treatment bring significant psychological challenges. Anxiety, uncertainty, and changes in life structure are common. Peer support, clinical psychology input, and mindfulness-based approaches all have evidence for reducing psychological distress during cancer treatment. Maintaining social connection, particularly during what might otherwise be an isolating experience, is associated with better psychological outcomes. Receiving treatment at home - without the disruption of regular hospital visits - helps many patients maintain the routines and relationships that anchor wellbeing.