Butyrate Prevents Chemotherapy Side Effects

• Resistant starches (the primary fuel for butyrate-producing bacteria like Faecalibacterium prausnitzii)

• Fermentable fibers (inulin, beta-glucans, pectins)

• Polyphenols (they selectively feed beneficial microbes)

• Fermented foods (to seed the ecosystem)

I’ll note why key foods matter as we go.

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Core Daily Foundations (aim for these every day)

• Cooked-then-cooled starch (potatoes, rice, oats, legumes) → ↑ resistant starch → ↑ butyrate

• 2–3 different fiber types/day (legumes, whole grains, veg, seeds)

• 1–2 fermented foods/day

• Healthy fats (olive oil, nuts, seeds) to support SCFA signaling

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🥦 7-Day Microbiome + Butyrate Diet

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Day 1

Breakfast

• Overnight oats (rolled oats soaked in kefir or yogurt)

• Blueberries + ground flaxseed
  → beta-glucans + polyphenols + lignans

Lunch

• Lentil & cooled potato salad (olive oil, mustard, herbs)

• Sauerkraut on the side
  → resistant starch + galacto-oligosaccharides

Snack

• Green banana (slightly underripe) or green banana flour smoothie

Dinner

• Roasted salmon

• Barley pilaf (cooled then gently reheated)

• Steamed broccoli
  → beta-glucans + sulforaphane support

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Day 2

Breakfast

• Plain yogurt or skyr

• Chia seeds + raspberries

Lunch

• Chickpea, arugula, red onion & olive oil salad

• Small serving kimchi

Snack

• Handful of walnuts + dark chocolate (≥70%)

Dinner

• Stir-fried tofu

• Cooled brown rice

• Bok choy & mushrooms
  → mushrooms feed butyrate-producing Clostridia

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Day 3

Breakfast

• Sourdough toast (long-fermented)

• Avocado + olive oil drizzle

Lunch

• Black bean soup (make ahead, reheat gently)

• Side of cabbage slaw

Snack

• Apple with almond butter
  → apple pectin → butyrate ↑

Dinner

• Baked chicken or tempeh

• Roasted carrots & parsnips

• Quinoa (cooled)

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Day 4

Breakfast

• Kefir smoothie with strawberries + flax

Lunch

• Hummus, cucumbers, olives

• Whole-grain pita

Snack

• Edamame

Dinner

• Sardines or mackerel

• Lentils with herbs

• Swiss chard sautéed in olive oil

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Day 5

Breakfast

• Steel-cut oats (cooked, cooled overnight)

• Cinnamon + pear

Lunch

• Farro salad with artichokes, spinach, olive oil
  → artichokes = inulin powerhouse

Snack

• Carrots + fermented yogurt dip

Dinner

• Baked cod or beans

• Sweet potato (cooked, cooled)

• Brussels sprouts

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Day 6

Breakfast

• Yogurt + granola made with oats, seeds, nuts

Lunch

• Miso soup with tofu and seaweed

• Side of brown rice

Snack

• Kiwi or pomegranate

Dinner

• Turkey or lentil meatballs

• Whole-wheat pasta (cooled slightly)

• Tomato sauce + olive oil
  → lycopene feeds beneficial taxa

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Day 7

Breakfast

• Overnight chia pudding with almond milk

• Blackberries

Lunch

• Cooled potato & white bean salad

• Sauerkraut

Snack

• Pumpkin seeds

Dinner

• Vegetable curry (onion, garlic, leeks)

• Cooled basmati rice
  → alliums strongly promote butyrate production

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🧬 Foods That Most Strongly Increase Butyrate

If you want to prioritize, these matter most:

• Cooled potatoes & rice

• Lentils, chickpeas, black beans

• Oats & barley

• Green bananas

• Artichokes, onions, and leeks

• Apples, berries

• Fermented foods