IBD Diet & Nutrition: Food, Fibre & Nutrient Needs

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Diet and nutrition play an important role in managing inflammatory bowel disease. But there is no single diet plan that works for everyone. Food choices may need to change depending on symptoms, disease activity, and individual tolerance. The focus should be on getting enough nutrition, staying hydrated, and identifying foods that may worsen the symptoms without any changes in diet. 

What Diet Can And Cannot Do

Diet can help manage symptoms, support proper nutrition, maintain a healthy weight, and help the body recover during a flare. It may also help prevent nutritional deficiencies when planned carefully. However, diet alone cannot improve IBD or replace prescribed treatment. There is also no universal IBD diet that works for everybody. Foods that trigger symptoms can vary from person to person, so unnecessary food restrictions should be avoided.

Eating In Remission

When IBD is in remission, the aim is to eat a varied and balanced diet rather than unnecessarily avoiding foods. Include enough protein, fruits and vegetables, whole grains or other fibre-rich foods, and healthy fats like olive oil as tolerated. Stay hydrated and maintain regular meals to support overall digestion. Eat peeled and well-cooked food during strictures and mild sensitivities.

Eating During Active Symptoms

During an IBD flare, some foods are harder to digest, especially when you have diarrhoea, abdominal pain, or bloating. Choose foods that are soft, low-fibre, lactose-free, and easier to digest. Foods that do not irritate the digestive tract include:

• Grains and starches, including white rice, boiled potatoes, plain oatmeal, and toast.
• Fruits and vegetables, including ripe bananas and skinless carrots. 
• Protein, including smooth nut butters and tofu.
• Stay hydrated. Drink water regularly; oral rehydration solutions if needed. Coconut water, salted soups, and buttermilk also help with rehydration. 
• Avoid high-fibre foods like raw vegetables, whole grains, nuts, and seeds.
• Avoid fried foods, heavy creams, alcohol, caffeine, artificial sweeteners, and sugary carbonated drinks.
• Strictly limit lactose-containing foods and spicy food because they are directly linked with bloating.

Indian Meal Examples

There is no single diet for IBD. In Indian meals, balance includes legumes, lentils, vegetables, whole grains, and probiotics. Foods that focus on soothing the agni (digestive fire) and calming doshas are considered good for IBD. Adjust meals based on whether you are in remission or having active symptoms, and base them on your personal tolerance. Some options include:

• Breakfast: Oats, poha, idli, or soft upma with well-cooked vegetables.  
• Lunch: Rice or roti with dal, cooked vegetables, cur paneer, or tofu, depending on personal tolerance. 
• Dinner: Soft khichdi, rice with moong dal, or bajra roti or millet roti with lightly cooked vegetables or lauki (bottle gourd), and a protein source.
• During flare: Soft, simpler meals such as rice, khichdi, moong dal, and well-cooked vegetables may be easier to digest. Keep protein smaller and drink enough fluids.

Protein, Calories, And Hydration

During IBD, getting enough protein and calories is important, especially during an active flare. When the body may need more nutrients, include protein-rich foods such as tofu and smooth nut butters. The body needs 1.0 to 1.5 grams of protein per kilogram of your body weight daily. It requires 30 to 35 calories per kilogram of your body weight daily to counter inflammation and malabsorption. Hydration is equally important, particularly if frequent diarrhoea and vomiting. Drink at least 8 to 10 glasses of water daily. Drink fluids regularly and replace lost electrolytes when needed. If you are struggling to eat or drink enough, you must consult with your doctor.

Iron, B12, Vitamin D, And Calcium

People with IBD can be at risk of iron, B12, vitamin D, and calcium deficiencies. These nutrients are important for energy, blood health, nerves, muscles, and bones. 

• Iron: Found in lentils, beans, leafy greens, and fortified foods. Iron deficiency may also occur due to ongoing blood loss.
• Vitamin B12: Found in dairy products and fortified foods. The risk can be higher when Crohn’s disease affects the small intestine. 
• Vitamin D: Found in fortified foods and some dairy products; sunlight helps the body make vitamin D. It is important for long-term bone health.
• Calcium: Found in dairy products, tofu, and some leafy greens. Calcium deficiency arises from poor absorption, and it’s crucial for bone health.

Doctors may recommend some supplements to balance these deficiencies. Do not overdose or prescribe any supplements on your own, as it depends on individual needs and blood levels. 

Fibre: When To Adjust It

Fibre does not have to be avoided by everyone with IBD. Consuming an adequate amount during IBD supports gut health. During remission, many people include fibre as a part of the balanced diet. During an active flare, especially during diarrhoea, pain, narrowing of the bowel, or risk of blockage, your doctor may suggest that you temporarily avoid high-fibre foods; once symptoms improve, fibre can increase based on the individual's tolerance. Make sure to drink plenty of fluids with an increased amount of fibre.

Common Nutrient Deficiencies

People with IBD may develop nutritional deficienciesbecause og reduced food intake, poor absorption, inflammation, or blood loss. Common nutritional deficiencies include iron, vitamin D, calcium, zinc, folic acid & magnesium. The risk can vary depending on the type of IBD, affected part of the gut, and treatment being used. Regular monitoring and specific supplements can help doctors identify and manage these deficiencies.

Small Frequent Meals

Eating small portions and frequent meals rather than eating everything at once is better and easier to digest in IBD. Larger meals may cause bloating, abdominal pain, discomfort, urgency, and breathing difficulties for some people. Try having 4-5 smaller meals instead of a whole meal in a single day. Smaller meals also provide the same amount of calories and protein to your body. Choose simple foods that are easier to digest for you.

Avoid Unnecessary Elimination Diets

Cutting out large groups of food is not necessary for everyone with IBD. Unnecessary eliminations can lead to multi-nutrient deficiencies. If you notice that any food is worsening your symptoms. Discuss it with your doctor first because over-restricting food intake worsens muscle loss, electrolyte imbalances, and overall fatigue. A dietitian can help you find suitable alternatives so your diet remains balanced. 

Food Diary And Personal Triggers

Keeping track of your diet with a physical diary or a digital diary can help you understand how your body responds to different foods, especially during a flare. Instead of completely avoiding food, track your symptoms and dietary patterns. Here are a few things you should note in your diary:

• Record your daily meals. 
• Track your symptoms, such as mild or severe abdominal pain, fever, vomiting, and changes in bowel movements.
• Look for patterns if the same food causes the same symptoms.
• Note other factors such as stress, fatigue, infections, medicines, and changes in routine due to any symptoms.
• Avoid unnecessary restrictions on your diet by yourself; discuss them with your doctor before.

Lactose Only If Poorly Tolerated

People with IBD do not need to avoid lactose unless it causes symptoms. If milk or other dairy products lead to bloating, gas, abdominal pain, or diarrhoea, lactose may be difficult to tolerate for you, especially during a flare. 

• Try smaller amounts of dairy to see how you respond.
• Choose lactose-free milk or dairy products if needed. 
• Curd and cheese can be easier to digest for some people, though it’s harder for others.
• Avoid cutting out all dairy products without professional guidance because it can reduce calcium and vitamin D in your body, and it can lead to dangerous nutritional deficiencies. 

Food Safety

People with IBD should follow basic food safety habits, especially when the immune system is affected by medicines. Infections caused by foods can sometimes worsen gastrointestinal symptoms.

• Wash fruits and vegetables well before eating.
• Choose well-cooked, seedless, and skinless fruits and vegetables.
• Avoid raw and undercooked foods because they may carry harmful bacteria.
• Avoid dairy products if you're lactose intolerant.
• Refrigerate perishable food and avoid eating food that has been stored for too long.
• Limit eating out and try home-cooked food.

When To See A Dietitian

A dietitian can help create a diet plan that meets your nutritional requirements while considering your symptoms and food tolerance. Consider seeing a dietitian if:

• You are losing weight without even trying.
• You have difficulty eating regular foods.
• You have multiple nutritional deficiencies.
• You are avoiding many foods because of your symptoms.
• Diet changes are not helping your condition. 
• You are unaware of what to eat during an ongoing inflammation or IBD.

Reference 

Role of diet and nutrition in inflammatory bowel disease - PMC

Diet and nutritional factors in inflammatory bowel diseases - PMC

A cross-sectional study on nutrient intake and status in inflammatory bowel disease patients - PMC

Food Elimination Diet and Nutritional Deficiency in Patients with Inflammatory Bowel Disease - PMC