Ovarian cancer is a serious condition that affects the ovaries, often diagnosed at a late stage due to its subtle symptoms. The treatment usually involves surgery, chemotherapy, and sometimes radiation.1 While medical treatment is essential, nutrition helps manage symptoms while maintaining strength and improving overall well-being.
Eating the right foods can help support the immune system, manage side effects like nausea and fatigue, and maintain energy levels.2 This article provides a detailed breakdown of dietary choices, strategies for symptom management, and long-term wellness habits.
Cancer treatments can make the immune system weak, making patients more vulnerable to different infections. However, consuming nutrient-rich foods can help strengthen the immune system and support overall health. Antioxidant-rich foods, such as berries, leafy green vegetables, as well as citrus fruits, are rich in essential vitamins like C and E that help support immune defense. Moreover, zinc, found in lentils, seeds, and lean meats, also plays a crucial role in building the immune function.
Additionally, probiotics, which are found in yoghurt, kefir, and fermented foods, support gut health. Prebiotic foods such as garlic, onions, and bananas can also help feed the good bacteria in the gut, which further boosts the immune function.5
Fatigue caused by cancer is common, and losing weight may further delay the healing process. Consuming enough calories is important for maintaining consistent energy levels. Therefore, a combination of complex carbohydrates (whole grains, legumes), healthy fats (olive oil, avocados), and proteins (lean meats, fish, dairy, and plant-based sources) can help you stay energized all day.6
Additionally, a lack of appetite is a common issue in cancer patients, so making calorie-dense, nutritious meals can also be helpful.
Chemotherapy and radiation treatments can cause nausea, loss of appetite, constipation, and diarrhoea. Making dietary changes, such as eating small frequent meals, eating plain foods, and staying hydrated, can significantly help reduce discomfort along with improving the ability to eat well during therapy.7
Soft meals such as mashed potatoes, oatmeal, and yoghurt can also help people experiencing a sore mouth. If metallic taste changes occur, using wooden utensils or adding lemon drops to the food may improve its taste.
Proteins are essential for cell repair, muscle maintenance, and immune system function. Ovarian cancer patients should choose leaner protein foods such as chicken, fish, eggs, tofu, beans, and lentils. In addition, dairy products, such as yoghurt and cheese, also supply protein and calcium. Protein shakes and smoothies are good alternatives for patients who struggle to eat solid foods.
Another good option is collagen-rich bone broth, which is very beneficial as it contains both protein and minerals, which help with overall health and immunity.8
Good fats provide a lot of energy while also reducing inflammation in the body. Incorporate healthy fats into your diet with avocados, almonds, walnuts, flaxseeds, chia seeds, olive oil, and fatty fish like salmon. These foods improve heart health and overall well-being.9
Furthermore, omega-3 fatty acids, which are found in walnuts, flaxseeds, and fish, have anti-inflammatory characteristics that may help decrease many cancer-related symptoms.
Fibre helps in digestion and can help avoid constipation, which is a common side effect of radiation therapy and certain medications. Whole grains (brown rice, quinoa, oats), fruits, and vegetables (particularly leafy greens, carrots, and squash) are good sources of fibre.10 Furthermore, fibre in your diet also helps regulate blood sugar levels and creates a sense of fullness, which is good for patients with appetite swings.
Staying hydrated is especially important for people who are experiencing nausea or diarrhoea. Water, herbal teas, clear broths, and electrolyte-rich fluids (such as coconut water) aid in hydration and support general processes in the body. If plain water tastes unpleasant, a piece of lemon, cucumber, or mint can improve its flavour.
Cutting back on ultra‑processed foods, like packaged snacks, candies, and soft drinks, is smart when it comes to ovarian cancer. A large UK Biobank cohort found that for every 10% increase in ultra‑processed foods, ovarian cancer risk rose by about 19%, with higher mortality too. These foods often spike blood sugar, encourage weight gain, and fuel inflammation, three known drivers of cancer development and poorer outcomes.11
Processed meats are officially Group 1 carcinogens (on the same list as tobacco smoke) due to strong evidence, though mainly for colorectal cancer.15 In ovarian cancer specifically, higher nitrite intake from processed meats has been linked to increased risk in large studies.16 It’s sensible to limit these and instead go for lean proteins, like fish, chicken, beans, lentils, tofu, or quinoa, to reduce exposure to nitrates, nitrites, and other harmful compounds.
Excessive sodium intake can cause bloating, water retention, and elevated blood pressure, which can interfere with recovery after medical treatment. Fried foods, which are heavy in harmful fats, can worsen digestive problems and contribute to inflammation. Opting for baked, steamed, or grilled foods is a healthier choice.
Alcohol is also classified as a Group 1 carcinogen, though its association with ovarian cancer is weaker compared to other cancers. Still, minimising intake helps support overall health during treatment. Caffeine itself isn’t clearly tied to ovarian cancer risk, but too much can dehydrate, which isn’t ideal. Sticking with water, herbal teas, or moderate coffee supports hydration and recovery.12
Small, regular meals are typically easier to digest than large ones. Ginger, which is widely known for its anti-nausea effects, can be taken as tea or in fresh slices. Bland foods such as plain crackers, plain rice, and applesauce can also help settle the stomach.17
Iron-rich and protein-packed snacks can boost energy levels during treatment. Good plant sources include spinach, lentils, fortified cereals, Greek yoghurt, and nuts, with NCCN and OncoLink noting their role in replenishing iron and supporting stamina. Staying well-hydrated is equally important, as even mild dehydration can worsen fatigue.18
Increase your fibre intake and remain hydrated to get relief from constipation. Foods like prunes, flaxseeds, and whole grains can be beneficial as they are excellent sources of fibre. Moreover, easy-to-digest meals such as bananas, rice, bread, and probiotic-rich yoghurt can improve gut health and help with diarrhoea symptoms.
Even if you're not hungry, you can still aim to get the right nutrients with a few simple food adaptations. To make eating less overwhelming, have food in smaller quantities throughout the day while supplying your body with the necessary calories and nutrients. Soft, high-calorie foods that are easier to digest, such as creamy soups, scrambled eggs, and full-fat dairy, are also helpful in maintaining your weight and energy levels.
Some days, it can be difficult to get all of the nutrients you need from food. That’s where supplements can help. For example, supplements like vitamin D (for bone health), omega-3 fatty acids (for inflammation), and probiotics (for gut health) are useful.13, 14
Before taking any supplements, you should visit a doctor or a dietitian. Some supplements can interact with cancer therapies, so it's important that you get professional advice to be safe.
Nutrition is essential for managing ovarian cancer and sustaining the body during therapy. A well-balanced diet high in lean proteins, healthy fats, whole grains, and fresh fruits and vegetables can help you stay energised, control treatment side effects, and enhance your overall health.
It is equally important to avoid processed foods, extra sugar, and unhealthy fats. Because each person's cancer journey is different, and it is strongly advised to consult with a healthcare practitioner to develop a specific dietary plan.
Eating properly during treatment does not require tight diets; rather, it involves taking tiny, easy options that promote healing and overall well-being.
Eating well plays a big role in helping your body cope with ovarian cancer and its treatment. While surgery and chemotherapy do the heavy lifting, the right food can help you feel stronger, manage side effects, and support your recovery.
A balanced diet gives your body the fuel it needs. Foods rich in protein, healthy fats, whole grains, and fresh fruits and veggies can boost your energy, support your immune system, and help you deal with fatigue or weight loss.
Cancer treatments often bring side effects like nausea, constipation, and loss of appetite. Simple changes, like eating soft, easy-to-digest meals, staying hydrated, and having small portions throughout the day, can really make eating easier.
It’s also advised to avoid certain foods. Processed snacks, sugary drinks, red or processed meats, fried foods, and salty items can make symptoms worse and slow down healing. Limiting alcohol and caffeine can also help your body feel better.
If you're struggling to get enough nutrients from food, supplements might help—but only if your doctor or dietitian says so. Some can interfere with treatment, so it’s best to ask first.
In the end, eating during cancer treatment isn’t about strict diets or rules. It’s about small, nourishing choices that help your body heal and keep you feeling your best.
