Back

OncoDots

Action / Info

🌱 The role of nutrition in cancer treatment

Why what you eat matters during chemotherapy and radiotherapy.

Nutrition does not cure cancer, but it plays an essential role in supporting your body throughout treatment. Eating well helps maintain muscle mass, supports the immune system, reduces the side effects of chemotherapy and radiotherapy, and contributes to a faster recovery. The international ESPEN and Memorial Sloan Kettering guidelines emphasise that well-nourished patients tolerate treatment better and have a higher quality of life.

Why nutrition matters more in cancer

Cancer treatment puts a significant strain on the body. Chemotherapy, radiotherapy and surgery increase the body's energy and protein needs. On top of this, common side effects — nausea, loss of appetite, mucositis — make it hard to keep up an adequate food intake. Without proper nutrition, the risk of clinical malnutrition rises, which can lead to treatment being interrupted or reduced.

What the international guidelines say

According to the ESPEN Guidelines on Nutrition in Cancer Patients (2021), every cancer patient should be assessed nutritionally at diagnosis and throughout treatment. The Canadian Cancer Society recommends maintaining body weight and muscle mass as the main goals. Memorial Sloan Kettering emphasises that there is no proven "anti-cancer diet", but there are nutritional principles that support quality of life and tolerance to treatment.

Not about perfection, but about support

The aim of cancer nutrition is not to radically change what you eat, but to give your body the resources it needs. Sometimes, a day when you managed to eat something — anything — is a good day. A gentle approach, adapted to how you feel, is more valuable than a strict regimen you cannot follow.

Key points

What to remember from this article

  • Nutrition supports tolerance to treatment and reduces complications
  • Every cancer patient should be assessed nutritionally at diagnosis
  • The goal is to support the body — not the perfect diet
  • Maintaining muscle mass and weight are important indicators

Related practical guides

Concrete tips for similar situations

Medical note

The information in this article is for guidance only and is based on international guidelines (ESPEN, Canadian Cancer Society, Memorial Sloan Kettering). It does not replace individualized medical advice. Discuss any nutrition decision with your medical team or an oncology nutritionist.

Sources

  • ESPEN Guidelines on Nutrition in Cancer Patients, 2021
  • Canadian Cancer Society – Nutrition and cancer
  • Memorial Sloan Kettering Cancer Center – Nutrition and Cancer
← Back to Nutrition Information
Language
Country
RORomania

Show information for:

OncoDots shows information, services and emergency numbers for the selected country. Language and country are separate — choose each independently.

Report a problem