Condition · IBS / FODMAP

IBS: FODMAPs, without guessing.

Filtering of fermentable FODMAPs, guided low-FODMAP phases, structured reintroduction. 500+ filtered recipes to respect your gut. Budday complements your medical care, it does not replace it.

Not a medical device. Diagnosis and follow-up of IBS remain the responsibility of your doctor and your gastroenterologist. Budday complements, it never acts in their place.
Buddy en blouse blanche, posture sérieuse
WhyIBS: FODMAPs, without guessing.

4 things we do specifically.

Low GI

Glycemic index low by default.

Many cases of IBS come with metabolic fragilities. Our low-GI filter stays active at the same time as the FODMAP filter: the two do not exclude each other. If you declare a single condition, we adapt. If you declare two, we combine them.

Macros

Macro ratio gentle on the gut.

The fiber ratio is calibrated so it does not overload you with fermentable fibers. We favor soluble fibers that are well tolerated (oats, squash, slightly underripe banana) over aggressive insoluble ones (raw cabbage, unsoaked legumes).

Portions

Portions calibrated to the FODMAP threshold.

Many foods contain FODMAPs in a tolerable amount up to a certain threshold. We give you the portion below the Monash table threshold, not a generous portion that triggers a flare.

Substitutions

Substitutions low-FODMAP on the fly.

For every recipe that contains garlic, onion, wheat or lactose, we offer a tested low-FODMAP swap (garlic-infused oil, green chives, gluten-free pasta, lactose-free milk). No recipe ever shows you a substitution that is risky for your gut.

Foods + tracked parameters

What we filter, what we watch.

Sources: Monash University (FODMAP), Société Nationale Française de Gastro-Entérologie (SNFGE), HAS.

Foods to limit during the active phase

  • Oligosaccharides (FOS/GOS) · garlic, onion, wheat, rye, unsoaked legumes, pistachio, cashew
  • Disaccharides (lactose) · milk, fresh cheeses, stirred yogurts ; OK: parmesan, aged comté
  • Monosaccharides (excess fructose) · apple, pear, mango, honey, agave syrup
  • Polyols · plum, cherry, apricot, mushroom, cauliflower, sweeteners ending in -ol (xylitol, sorbitol)
  • Drinks · sodas, concentrated fruit juices, hard liquor on an empty stomach

Tracked parameters

  • Bristol scale · stool form, daily log if you track
  • IBS-SSS score · overall severity, monthly entry
  • Food / symptom journal · food-trigger correlation over 7 days
  • Stress and sleep · markers correlated with IBS
  • Low-FODMAP / reintro phases · 6-8 weeks strict, then gradual reintroduction
Filtered recipes · IBS: FODMAPs, without guessing.

3 recipes to start with.

See all 500+ recipes
Red lentils in coconut milk.
Low GI 25 min

Red lentils in coconut milk.

410 kcal · 4 servings
Salmon over braised leeks, ginger.
Low GI 25 min

Salmon over braised leeks, ginger.

380 kcal · 4 servings
Cod baked in parchment, fennel and lemon.
Low GI 30 min

Cod baked in parchment, fennel and lemon.

280 kcal · 4 servings
And the sport side

Gentle movement during flares.

Regular moderate physical activity improves transit and reduces visceral perception. Gentle yoga, walking, swimming are the first things to reach for. During an acute flare, though, your gut is irritated, so it is not the moment to string together HIIT or running.

The Budday sport plan calibrates to your phase (outside a flare = free to go at your level, during a flare = active rest + stretching). Buddy knows when you are climbing back up and reschedules a more demanding session when you are ready.

  • Post-meal walk · 15 min, encourages regular transit
  • Gentle yoga · poses that mobilize the belly without abdominal pressure
  • Swimming · no impact, ideal during the recovery phase
  • Avoid · HIIT, crunches, intense running during a flare
Buddy en tenue de sport

The 3 low-FODMAP phases

The Monash method distinguishes 3 phases: strict elimination (6-8 weeks), gradual reintroduction (8-12 weeks) and lifelong personalization. Budday walks you through all 3, not just phase 1.

Not a medical device

The app does not replace your gastroenterologist or a dietitian trained in FODMAP. It complements them. The IBS diagnosis (Rome IV criteria), ruling out other conditions (IBD, celiac disease, isolated lactose intolerance), and clinical follow-up remain their domain. You can export your journal as an encrypted PDF.

Morning fasted weigh-in

If you weigh yourself in the context of IBS (weight loss or gain tied to symptoms), do it in the morning upon waking, fasted (06:30-08:00). Not in the evening: end-of-day bloating would distort the reading.

Not a medical device

Diagnosis, treatment and follow-up of any condition remain the responsibility of your doctor and specialist. Budday complements, never replaces.

Recipes and tracked parameters are indicative, based on public recommendations (HAS, ANSES, specialised learned societies).

Frequent questions

What we get asked the most.

Still looking for an answer? Write to us.
Is this adaptation permanent?
As long as your condition stays declared in your profile, yes. Recipe filtering, macro calibration, substitutions, all of it keeps applying without you having to restate it. You can switch it off whenever you want in Settings.
Do you replace my doctor?
No. Budday is not a medical device: we complement, we never replace. Diagnosis, treatment and clinical follow-up stay with your doctor and your specialist. We help you apply their guidance day to day.
What if I have several conditions to manage?
We combine them without breaking anything. Type-2 diabetes + gluten-free, cholesterol + lactose intolerance, tree-nut allergy + vegetarian: every combination is handled at once in the menu calibration and the swaps we suggest.
Your sources, what are they?
For each condition: public guidelines from HAS, ANSES, learned societies (Société Francophone du Diabète, AFDIAG, and more) and recent peer-reviewed studies. No isolated opinion, no sponsored advice. The sources are cited on every condition page.