Going through breast cancer treatment is never just physical—it’s emotional, mental, and yes, deeply personal. And while food may seem like the last thing on your mind, the truth is, what you eat can have a big impact on how you feel throughout your journey.
So, what should you eat? What should you avoid? And how can you nourish your body when even toast feels like too much?
Let’s walk through it together.
Why Nutrition Matters During Cancer Treatment
Let’s start with this simple truth: your body is doing some serious work right now. From handling chemotherapy to healing after surgery, every system is on high alert. And that means your body needs fuel—the right kind of fuel.
Good nutrition can:
- Help you tolerate treatments better
- Support your immune system
- Reduce the risk of infection
- Keep your energy levels steady
- Aid in maintaining muscle mass and healthy weight
In short? Eating well won’t cure cancer, but it can absolutely help you feel more in control.
Dealing with Common Side Effects Through Diet
Nausea. Fatigue. Mouth sores. Constipation. The list isn’t fun, but it’s real. Thankfully, there are ways to work around them through food:
- Nausea: Try dry crackers, ginger tea, or cold foods that don’t smell too strong.
- Loss of appetite: Eat small meals throughout the day. Think snack-size.
- Fatigue: Keep quick, nutrient-dense snacks nearby—like trail mix or protein smoothies.
- Mouth sores: Go for soft, cool, bland foods like yogurt, mashed potatoes, or smoothies.
Ask yourself: What feels good right now? Then go from there.
Foods That Boost Immunity and Fight Inflammation
Your immune system might be working overtime, so how can food help give it a gentle nudge?
Start with these:
- Brightly coloured fruits and veggies (like berries, spinach, sweet potatoes)
- Omega-3 rich foods like salmon, walnuts, and chia seeds
- Whole grains for fibre and energy
- Spices like turmeric and ginger, known for anti-inflammatory properties
A warm bowl of lentil soup with spinach and a dash of turmeric? That’s both comfort and care in one dish.
Staying Hydrated: More Than Just Drinking Water
Water is essential, but during treatment, you might forget to drink enough—or plain water might taste off.
Try these hydration helpers:
- Coconut water
- Herbal teas
- Broths and soups
- Water infused with fruits or cucumber
Set a timer or use a hydration app. Even ice chips or popsicles count. The goal is to keep things moving and your body balanced.
Small Meals, Big Benefits: Eating When You Don’t Feel Like It
Chemo fatigue is real. And when your appetite vanishes, the idea of eating a full meal? Overwhelming.
So, don’t force a feast. Just aim for bites.
- Keep small snacks within arm’s reach
- Blend fruits, veggies, and protein into smoothies
- Have a bite or two every 2–3 hours
Think of food like fuel. You don’t need a full tank, but you do need enough to keep the engine running.
Managing Taste Changes and Food Aversions
Does your favourite food suddenly taste metallic? Or just… weird?
You’re not imagining it. Treatment can dull your sense of taste or make things taste unpleasant.
Tips to cope:
- Use plastic cutlery if things taste metallic
- Try tart foods like lemon or pickles (if tolerated)
- Rinse your mouth before and after eating
- Experiment with herbs and spices
Sometimes, it’s just about trial and error. Be kind to yourself. Taste buds change, and that’s okay.
The Power of Protein: Healing and Strength in Every Bite
Protein isn’t just for bodybuilders—it’s for anyone in recovery. And during treatment, your body needs extra to heal and stay strong.
Good sources include:
- Eggs
- Fish and chicken
- Lentils and beans
- Nut butters
- Dairy or fortified plant-based milk
Even if it’s just a spoonful of peanut butter or a scrambled egg—every bit helps.
Plant-Based Foods That Pack a Punch
You don’t need to go full vegan, but adding more plant-based options can be powerful. Why?
Because they’re loaded with fibre, antioxidants, and essential nutrients.
Great plant picks:
- Broccoli, kale, spinach
- Carrots, pumpkin, sweetcorn
- Quinoa, brown rice
- Legumes like chickpeas and lentils
Try making a colourful veggie stir-fry or lentil curry. Tasty, comforting, and packed with goodness.
Should You Take Supplements During Treatment?
This one’s tricky.
While supplements sound like a great idea, some can actually interfere with treatment. High-dose antioxidants, for instance, might reduce chemotherapy effectiveness.
What’s the best move? Ask your oncologist or a registered dietitian before starting anything new.
When in doubt, get your nutrients from food first.
Meal Prep for Low Energy Days
Cooking when you’re exhausted? Probably not happening.
But a little planning on a good day can make a world of difference.
Ideas:
- Batch-cook soups or stews and freeze in small portions
- Pre-cut fruits and store in containers
- Make a big tray of roasted veggies
- Keep frozen meals that are healthy and easy to heat
Let friends or family help too. If they ask, “What can I do?” — say, “Help me meal prep.”
Sugar and Cancer: What’s the Real Deal?
You’ve probably heard it: “Sugar feeds cancer.” But is it true?
Not exactly. All cells (including healthy ones) use sugar for energy. Cutting sugar entirely isn’t necessary—and can lead to poor nutrition.
What matters is limiting added sugars from:
- Sugary drinks
- Baked goods
- Candy
Focus instead on whole, unprocessed carbs like fruits, oats, and brown rice.
Handling Digestive Issues: Constipation, Diarrhoea & Bloating
It’s uncomfortable, but very common. Here’s how to manage with food:
- Constipation: Add fibre from whole grains, fruits, and drink plenty of water.
- Diarrhoea: Stick with bananas, white rice, toast, and yogurt (BRAT diet).
- Bloating: Eat slowly, avoid carbonated drinks, and skip gas-producing foods like beans (temporarily).
Still struggling? Speak to a healthcare provider—it’s okay to ask for help.
Healthy Weight Management During Treatment
Some lose weight. Others gain. Both can feel confusing.
Instead of stressing over numbers, focus on nourishment:
- Eat mindfully and regularly
- Choose nutrient-rich foods over empty calories
- Stay active in small ways—stretch, walk, or dance around the kitchen
If weight changes worry you, talk to your care team. You’re not alone in this.
Special Diets: Keto, Alkaline, or Gluten-Free – Are They Worth It?
It’s tempting to jump into trending diets—especially when they promise hope.
But here’s the thing: there’s no miracle diet that cures cancer.
Some may help manage side effects or allergies, but most restrictive diets can leave you low on energy or nutrients.
Best practice? Stick with a balanced, colourful plate unless advised otherwise by a professional.
Talking to a Dietitian: When and Why It Helps
Feeling overwhelmed with food choices? That’s where an oncology dietitian comes in.
They can:
- Tailor a meal plan to your needs
- Help manage symptoms through diet
- Ensure you’re getting enough nutrients
It’s like having a food coach who understands your treatment.
Don’t be afraid to ask your care team for a referral.
Final Thoughts
Nutrition during breast cancer treatment doesn’t have to be perfect—it just needs to be supportive. Some days you’ll eat a full meal. Other days, just a few spoonfuls. Both are okay.
Your body is already doing something amazing by fighting. Let food be one small way you show it some love.
References
- “Nutrition During Cancer Treatment” – American Cancer Society, 2022 – https://www.cancer.org/cancer/cancer-basics/nutrition-during-treatment.html
- “Eating Well During Cancer Treatment” – National Cancer Institute, 2023 – https://www.cancer.gov/about-cancer/treatment/side-effects/appetite-loss/nutrition-pdq
- “Breast Cancer and Diet: What’s the Connection?” – Mayo Clinic, 2023 – https://www.mayoclinic.org/diseases-conditions/breast-cancer/expert-answers/breast-cancer-diet/faq-20058473
- “Managing Nutrition During Chemotherapy” – MD Anderson Cancer Center, 2021 – https://www.mdanderson.org/publications/focused-on-health/managing-nutrition-during-chemotherapy.h15-1589049.html