What to eat on a plant based whole foods keto for cancer diet
Home Metabolic Dietary Therapy: Fasting, Keto and Functional Foods What to eat on a functional therapeutic ketogenic diet

What to eat on a functional therapeutic ketogenic diet

by Maggie Jones

Most people have come to associate a keto diet with large quantities of meat, bacon, cheese and butter that we know are themselves responsible for a significant percentage of cancers, heart disease, diabetes, and stroke.

The fact is, ketogenic diet is simply one that eliminates dietary sources of sugar and forces the body to burn fat as fuel. Eating animal products is in no way a requirement and it is entirely possible — I’d argue preferable — to maintain ketosis on a whole foods, plant-based diet. I’ve done it for 18 months now, and never plan to go back.

The research indicating increased survival for cancer patients using a ketogenic diet is quickly becoming overwhelming. As is the research correlating a whole foods, plant-based diet with reduced cancer diagnosis and recurrence rates.

The commitment I made the first week after diagnosis is that I would only eat foods that are actively healing. Those that evidence shows would make my healthy cells stronger and my cancerous cells weaker. I strongly credit this way of eating with my healing.

In this post I cover:

what are functional foods for cancer

Functional foods for cancer

According to the Mayo Clinic, “Functional foods are foods that have a potentially positive effect on health beyond basic nutrition.” The term functional is usually used to describe a “food as medicine” dietary approach.

In the case of my diet, I looked to focus on foods that had been shown to

  1. kill cancer cells in the lab and which epidemiological studies have shown to be strongly correlated with low cancer incidences in large populations
  2. reduce body inflammation, as an inflammatory environment is just the type of environment cancer loves
  3. improve immune function

The foods that match the criteria above have generally been shown to be most effective – or only effective – in their whole, unprocessed form. Only a few were too high carb to be eaten regularly and stay in ketosis. I therefore focused my diet around those that were lowest carb, leaving room in my daily macro allotment for higher carb foods shown to be especially healing.

I hope you like vegetables…

The foods that form the basis of my functional whole foods plant based therapeutic keto for cancer diet

Foods around which I build my diet

A post describing how I eat can be found here. The information below is the same presented from a more general perspective.

The primary foods to eat on a whole foods, plant-based keto diet:

  1. Dark green, leafy vegetables (kale, spinach, lettuces, etc.)
  2. Cruciferous vegetables (broccoli, cabbage, kale, Brussels sprouts, etc.)
  3. Healthy fats (avocado, coconut, flaxseed oil, olive oil, etc.)
  4. Nuts and seeds (flax seeds, chia seeds, pecans, almonds, etc.)
  5. Low-sugar fruits (blackberries, raspberries, strawberries, etc.)

Overall tips to keep in mind:

  • The more colorful, the better. The color is the nutrient.
  • As a general rule, these foods are most beneficial eaten raw or freshly ground. In the case of cruciferous vegetables (broccoli, cauliflower, brussels sprouts, etc) this is especially true. If you prefer to eat them cooked, chop them at least 40 minutes before cooking so that sulforophane has time to form. Some studies indicate flaxseed and garlic lose potency within minutes of chopping. On the flip side, certain foods, marked below, show increased benefits when cooked.
  • Always read the ingredients! Every ingredient should be acceptable to you. The other day I came across a package labeled “100% pure acai pulp” and only after reading the ingredients did I see it was 99% acai pulp and 1% unacceptable ingredients. Hidden sugar and chemicals are lurking everywhere. I once bought a package of apples with the most disgusting grape flavor – turns out they’d been injected with sugary, chemical grape flavor. Who does that to an apple? Don’t trust anything and always read the ingredients!

⭐ a star indicate real functional nutrition stars that I try to focus my diet around.
✅ a checkbox indicate the foods so powerful I try to eat them daily
🍳 a pan indicates those foods that are best eaten cooked
🤏 a pinch indicates foods that should be eaten in smaller amounts as they fit your macros

Fruits & Vegetables

  • Artichoke
  • Arugula⭐
  • Asparagus🍳🤏
  • Avocado
  • Beets 🤏
  • Bell pepper 🤏
  • Bok choy⭐
  • Broccoli (Broccoli sprouts, broccoli rabe, rapini, broccolini, romanesco, etc) ⭐✅
  • Brussels Sprouts⭐
  • Berries⭐🤏
  • Cabbage (Savoy cabbage, napa cabbage, red cabbage, etc)⭐
  • Capers ⭐
  • Carrot⭐🤏
  • Cauliflower (broccoflower, romanesco, etc)⭐
  • Chayote
  • Celery
  • Celariac root 🤏
  • Chard (swiss, rainbow, etc)⭐
  • Coconut
  • Collard greens⭐
  • Cucumber
  • Eggplant/ Aubergine 🍳🤏
  • Endive
  • Edamame/ Whole soy beans
  • Fennel ⭐
  • Garlic ⭐✅
  • Ginger⭐
  • Green apple 🤏
  • Green beans (string beans, snap beans)🤏
  • Jackfruit
  • Jicama
  • Lemon 🤏
  • Lime 🤏
  • Kale⭐
  • Kiwi 🤏
  • Kohlrabi⭐
  • Konjac yam
  • Leeks 🤏
  • Maca⭐
  • Mushrooms (turkey tail, shiitake, maitake, portobellow, etc)🍳⭐
  • Mustard
  • Nettles 🍳
  • Olives
  • Okra
  • Onion (red, green, etc) 🤏
  • Radicchio
  • Radish (daikon, etc)
  • Sauerkraut
  • Sea vegetables (seaweed, kelp, dulse, etc) ⭐
  • Spinach
  • Summer squash (chayote, yellow, etc)
  • Tomato 🍳🤏
  • Turnip
  • Watercress
  • Zucchini

Herbs, Spices & Sweeteners

  • Basil
  • Cacao ⭐
  • Capers ⭐
  • Chilis/ red pepper⭐
  • Cilantro/ coriander⭐
  • Cinnamon ⭐✅
  • Dill
  • Galangal
  • Garlic ⭐✅
  • Ginger ⭐
  • Lemongrass
  • Monkfruit🤏
  • Mustard ⭐
  • Parsley ⭐
  • Oregano ⭐
  • Rosemary ⭐
  • Sage
  • Salt, non-iodinized (Himalayan pink, Celtic gray)
  • Stevia 🤏
  • Thyme
  • Turmeric⭐✅

Nuts & Seeds

  • Almonds
  • Brazil Nuts ⭐✅ (no more than 2-3 per day)
  • Chia seeds⭐
  • Coconut
  • Flax seed/ linseed ⭐✅
  • Hazelnuts/ filberts
  • Hemp seeds
  • Macadamia nuts
  • Pecans
  • Pine nuts
  • Pistachios
  • Pumpkin seeds
  • Sesame seeds
  • Walnuts

Oil, Vinegar & Seasonings

  • Apple cider vinegar ⭐✅
  • Avocado oil
  • Balsamic vinegar 🤏
  • Coconut oil
  • Flaxseed/ Linseed oil ⭐✅
  • Olive oil⭐✅
  • MCT oil
  • Sesame oil
  • Vinegar (white, wine, red)


  • Green tea ⭐✅
  • Miso 🤏
  • Nutritional yeast
  • Tamari
  • Other fermented food like sauerkraut, sugar-free kimchi, tempeh, water kefir, coconut yogurt, etc) ⭐✅
  • Select other teas, powders & tinctures (ashwaganda root, turkey tail extract, black seed oil, etc) ⭐✅

Click here to download a printable version of the above list.

Occasionally acceptable foods

  • Fruits not on this list – fruits are incredible sources of nutrition but sadly too high in natural sugars to be compatible with deep, therapeutic ketosis. I reserve them for special occasions and usually fast to quickly reset my GKI after the special meal.
  • Tofu – it’s highly processed but nutritious and versatile; look for the least processed, organic tofu you can find.
  • Other legumes like peanuts, chickpeas (garbanzo) and mung beans.
  • Starchy vegetables like yam, celeriac, and rutabaga. They need to be thoughtfully included where they fit your macros.
  • Organic, pasture-raised egg.
  • Wild-caught oily fish (salmon, sardines, herring, trout or mackerel).

What's most important in a functional therapeutic keto for cancer diet

When you absolutely must “cheat”

This way of eating can be difficult at first but to me there’s no reason I’d want to ever make my cancer stronger. Even so, given the emotional roller-coaster of chemo, cancer and simply being human, sometimes you feel you absolutely must eat something that’s not healing.

If I have to prioritize during treatment, remaining in ketosis is my highest priority. I really try hard to stay away from the “keto junk food” but on rough days I would break and hit up Brad’s supply of Quest bars or Lily’s chocolate. I never ate meat but grass-fed or pasture-raised animals are probably a good choice for those who are falling off the wagon, anyway as they are whole, unprocessed food.

Now that I’m in remission and eating to prevent recurrance, I’m less concerned with my GKI and prioritize whole foods meaning my indulgences are centered around apples and yams.

If you do, don’t beat yourself up. You’re going through so much right now. Just don’t let one bad meal “ruin the day” – or worse, week. Get right back to eating healing, whole foods that will strengthen your body and fight your cancer.

functional whole plant based foods for a therapeutic keto for cancer diet

Pantry staples for functional, therapeutic ketosis

Below are the foods I stock in my cupboards to make sure I can make any of my favorite meals and only need to pick up the produce for my planned meals.

In this section, I’ve linked to the actual brands that I use and are in my cupboard or refrigerator now. In some cases I may have an affiliate partnership with the brand, in which case I will earn a (very) small commission if you purchase through this link. This in no way influences what I recommend.

Nuts, Butters & Seeds

Oils & Vinegars

Sauces & Condiments

Spice Rack & Baking

All spices are great! I just don’t have much room in my little Hong Kong kitchen so I prioritize:

Snacks & treats

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Ida April 23, 2020 - 7:44 pm

Fantastic work with the food list! Totally love it! More focus on putting stars on the plate from now on.

Maggie Jones April 23, 2020 - 9:00 pm

You are so so kind! Your dishes are always stars already! ⭐⭐

Jeni May 29, 2020 - 2:39 pm

This food list is amazing!! Thank you. Do you think you could attach an easily printable version of this? I’d love to have this on my fridge. Thank you so much again.

Maggie Jones May 29, 2020 - 4:24 pm

Oh Jeni! That’s a brilliant idea! I’ll work on it this weekend! Thank you

Jo November 16, 2020 - 6:20 pm

I have stage 3 ovarian cancer. I have been going through alternative treatment and eating a keto vegan diet. I have become extremely thin and extremely exhausted (I’m 5’1″ and weigh 93 pounds). My doctor isn’t worried about this, but I am. What can I add to get my weight up? I should add that I can’t eat raw veggies because of a reverse ostomy after my cancer surgery. Should I add wild-caught salmon a few times a week? What about raw cheese?

Maggie Jones November 16, 2020 - 7:30 pm

Hi Jo,
I’m so sorry for what you’ve been through but it sounds like you’re doing all the right things. Nevertheless, you absolutely shouldn’t feel exhausted if you’re getting the nourishment you need.

While I can’t provide medical advice, nor can I comment on your specific case without more details, my usual advice for clients who need to gain weight is to increase the fat in their diet. An extra serving of flaxseed porridge, chia seed pudding, and avocado can easily add 300-500 calories each. Each additional tablespoon of olive oil or flaxseed oil in your dressings, MCT oil in your coffee or coconut oil in your green tea will add around 120 calories in healing fats. Preparing smoothies and treats with full fat coconut milk can add hundreds of calories a day as will an extra sprinkle of hemp seeds, flax seeds, pumpkin seeds or nuts on your salad. I’ve personally gained over ten pounds in a month through nuts alone – not a good thing in my case.

Wild-caught salmon is an excellent source of protein but remember that you must track your protein as vigilantly as your carbs to remain in therapeutic keto. Any amount of protein beyond that required to build and maintain lean body mass is converted into glucose. Regular GKI testing will allow you to identify your protein needs. For every one of my clients to date, excess protein will cause a higher spike in GKI than excess whole food carbs. This has been validated by the Charlie Foundation as well.

Finally, every person is different but I personally find dairy extremely inflammatory and have had to avoid it. It will cause me to gain weight but only as a result inflammatory swelling, increased edema, and microbiome changes. Your mileage may vary but I recommend a cautious approach.

I hope this is helpful. Sending you much love!

Femmy Rouw August 16, 2022 - 10:44 am

Dear Maggie. I follow the news about your upcoming movie. On that website there was a GBM survivor who had her genome tested to customize her diet to her own genetic make up. That really resonated to me. As I have a family history with GBM and have gut issues with healthy foods as well I would like to know where you can have that done. Thank you in advance. I am in Australia but I can send it overseas as well. Kind regards

Maggie Jones August 16, 2022 - 3:54 pm

Hi Femmy! I use https://nutritiongenome.com/ and I think Alison does as well. If you need more that their default nutrition report provides, they offer a free course and a paid course to dive in more deeply. I found some interesting insights in the default report but needed additional research to understand the significance of my SNPs (single nucleotide polymorphisms or individual genetic variations). Above all, though, I remember that my genes are a blueprint but my lifestyle and epigenetic factors control which genes are actually expressed and how. Knowing the blueprint I had to work with is super cool but only regular testing points of concern or really listening to my body will tell me where I’m at now. Sending love!!

Maggie Jones August 16, 2022 - 5:34 pm

Hi Femmy! I just emailed them and I think I can get you 10% off if you decide to order a kit. Let me know!

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