Protect Your Gut Health! 8 Foods That Worsen IBS and Their Alternatives

2025年08月07日
Protect Your Gut Health! 8 Foods That Worsen IBS and Their Alternatives

Table of Contents

  1. What is IBS: Symptoms, Causes, and Prevalence in Japan

  2. The Relationship Between Food and Symptoms: The Scientific Background of FODMAP

  3. 8 Foods That Worsen IBS and Alternatives

  4. Steps to Implement a Low FODMAP Diet

  5. Sample One-Week Menu for Japanese People

  6. Frequently Asked Questions (Q&A)

  7. Key Points When Consulting Medical Institutions

  8. Conclusion: Towards a Gut-Friendly Diet

1. What is IBS: Symptoms, Causes, and Prevalence in Japan

IBS (Irritable Bowel Syndrome) is a functional disorder that presents chronic abdominal symptoms despite no organic abnormalities in the digestive tract. According to an epidemiological survey by the Japanese Society of Gastroenterology, about 10-15% of adults are affected, with a slightly higher prevalence among women in their 20s to 40s. Although multiple factors such as stress, autonomic nervous system imbalance, gut microbiota balance, and genetic predisposition are involved, "dietary content" is considered the most easily modifiable and effective factor.telegraph.co.uk

2. The Relationship Between Food and Symptoms: The Scientific Background of FODMAP

FODMAP stands for "Fermentable Oligo-, Di-, Mono-saccharides And Polyols," referring to a group of carbohydrates that are poorly absorbed in the intestine. These rapidly ferment in the colon, producing gas and drawing water into the intestinal tract through osmosis, causing bloating and diarrhea. The low FODMAP diet developed by the University of Sydney, low FODMAP diet, has been reported to have a symptom improvement rate of 76% and is recommended internationally as a dietary therapy.Harvard Health

3. 8 Foods That Worsen IBS and Alternatives

#Foods to AvoidMain Causes of SymptomsJapanese Alternatives
1Wheat Products (Bread, Pasta, Udon)Fructans (Oligosaccharides)Rice, Rice Flour Bread, 100% Buckwheat Noodles, Oatmealtelegraph.co.uk
2Dairy Products (Milk, Soft Cheese)LactoseLactose-Free Milk, Soy Milk, Almond Milk, Aged Cheese (Cheddar, Parmigiano)telegraph.co.uk
3Beans, Lentils, ChickpeasGOS (Galacto-oligosaccharides), Insoluble FiberFirm Tofu, Yuba, Miso, Canned Lentils (Rinsed), Small Amounts of Edamametelegraph.co.uk
4Alcohol (Beer, Red Wine, Rum)Contains FODMAP & Irritates MucosaSmall Amounts of Distilled Spirits like Shochu, Gin, or 0.0% Non-Alcoholic Beveragestelegraph.co.uk
5Spicy Foods (Chili Peppers, Chili Oil)Capsaicin Promotes Intestinal MotilityFlavor with Herbs (Basil, Oregano), Sansho, Sesame Oiltelegraph.co.uk
6Fried Foods & High-Fat FoodsDelayed Digestion & Bile SecretionGrill, Steam, Use Small Amounts of Olive Oil, Air Fryer Cookingtelegraph.co.uk
7Coffee & Caffeinated BeveragesCaffeine Stimulates the IntestinesDecaf, Barley Tea, Peppermint Tea (Antispasmodic Effect)telegraph.co.uk
8High FODMAP Fruits & Vegetables (Onions, Apples, Broccoli, etc.)Fructans/Fructose/PolyolsLeafy Greens, Carrots, Pumpkin, Bananas, Strawberries, Citrus Fruits, etc. Low FODMAP Ingredientstelegraph.co.uk

Point
When choosing alternative foods, pay attention to "quantity" as well. Even low FODMAP ingredients can cause symptoms if consumed in large amounts exceeding the threshold. Keeping a food diary and symptom record is important to determine individual tolerance levels.Harvard Health

4. Steps to Implement a Low FODMAP Diet

  1. Elimination Phase (2-6 weeks): Thoroughly eliminate the above 8 categories to lower the baseline of symptoms.

  2. Reintroduction Phase (6-8 weeks): Reintroduce food groups one at a time in small amounts and evaluate the presence of symptoms.

  3. Personalization Phase (Lifelong Management): Expand variations within tolerable ranges to prevent nutritional deficiencies and reduced gut microbiota diversity.

When consulting a medical institution, it is safe to proceed under the guidance of a registered dietitian.Harvard Health



5. Sample One-Week Menu for Japanese People (Fully Low FODMAP Compliant)

DayBreakfastLunchDinnerSnack/Dessert
MondayWhite Rice + Grilled Salmon + Boiled Leafy Greens + Miso Soup (Tofu, Wakame)100% Buckwheat Noodles (Dashi, Soy Sauce, Mirin) + Soft-Boiled EggGrilled Chicken Breast with Salt Koji + Simmered Pumpkin + Grated DaikonBanana (1/2)
TuesdayBrown Rice Porridge (150 g) + Shirasu + Sesame-Dressed KomatsunaPure Rice Bread Egg Sandwich (Small Amount of Mayo) + 3 Cherry TomatoesMiso-Simmered Mackerel (Only Ginger Used) + Stir-Fried Root Vegetables and Konjac + Spinach with Ponzu5 Strawberries
WednesdayOatmeal Porridge (Rice Style) + Natto (Without Sauce, Soy Sauce)Chicken Tender and Cucumber Grain Salad + Rice Flour RollGinger Pork (Without Onions) + Glazed Carrots + Mozuku VinegarLactose-Free Yogurt + Blueberries
ThursdaySoba Tea Porridge + Dashi-Maki Tamago2 Salmon Flake Rice Balls + Miso Soup Without Ingredients + PicklesGrilled Sea Bream + Simmered Taro + Boiled Bok Choy1 Mandarin Orange
FridayRice Flour Bread + Aged Cheddar Cheese + Small Amount of ButterTofu Steak with Mushroom Sauce (Shimeji, Enoki) + White RiceSteamed Cod with Sake + Grilled Zucchini + Mizuna Tuna SaladDecaf Latte (Soy Milk) + Brown Rice Crackers
SaturdayMixed Grain Rice + Salted Salmon + Miso Soup (Wakame, Chives)Grilled Chicken with Yuzu Pepper Rice Bowl + Komatsuna and Carrot NamulLean Beef Steak (30g Fat Trimmed) + Carrot Puree + Lettuce Salad1/2 Kiwi
SundayBuckwheat Crepe (Egg, Soy Milk Batter) + Banana SlicesGrilled Pacific Saury + White Rice + Grated Daikon + Spinach Miso SoupTeriyaki Yellowtail (Dashi, Mirin, Soy Sauce) + Pumpkin Salad + Tofu and Wakame Clear SoupBaked Sweet Potato


Creation and Implementation Points

  1. All meals are below the FODMAP limit per serving. Even with the same low FODMAP ingredients, you can eat safely

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