Always bloated – why this can happen (even on a vegan diet) and what you can try

I don’t know how many times I’ve thought: I eat plant-based. Healthy. Lots of vegetables. Everything done right.
And yet my stomach feels like it has secretly decided to inflate itself.

Sometimes it’s just a feeling of pressure.
Sometimes everything feels tight.
And sometimes, in the evening, clothes suddenly don’t fit anymore – even though they were perfectly fine in the morning.

And let’s be honest for a moment: having to fart all the time can lead to some pretty uncomfortable situations.
At work. On the train. Or exactly at the moment when you were really trying to stay unnoticed.

The frustrating part is this: a plant-based diet should be supportive.
And for many people, it is – just not automatically. And definitely not for everyone in the same way.

This text is not medical advice and not a promise of healing.
It’s an honest attempt to explain why bloating can be so individual – and to share approaches that many people find helpful.

What do we actually mean when we say “bloated”?

Colloquially, many different sensations get lumped together as “bloating,” but in reality, different things can be going on:

• Increased gas in the gut: bloating, rumbling, pressure
• Visible abdominal distension: the belly actually becomes larger, sometimes even without a lot of gas – for example due to slow gut movement or muscular reactions

Both can feel very similar, but they don’t always have the same cause. That’s exactly why people react so differently.

Why does every stomach react differently?

In most cases, there isn’t one single trigger. It’s usually a combination of several factors.

1) The microbiome – your gut flora is individual
Which bacteria dominate in your gut strongly influences how food is processed.
What causes no issues for one person can lead to significantly more gas for another.

2) FODMAPs – fermentable carbohydrates
Certain carbohydrates are poorly absorbed in the small intestine and more strongly fermented in the large intestine.
This can produce gas and draw water into the gut, which may cause pressure or bloating in sensitive individuals.
Important: these substances are not “bad,” but not everyone tolerates them equally well.

3) Fiber – healthy, but not always in every amount
A plant-based diet often contains significantly more fiber.
That’s generally a good thing long-term, but with a rapid increase or very large portions, it can temporarily backfire.

4) Gut motility
When food moves more slowly through the digestive tract, there is more time for fermentation.
This can be influenced by stress, lack of movement, dehydration, poor sleep, hormonal phases, or certain medications.

5) Stress and the nervous system
The gut reacts very sensitively to stress and emotional strain.
This can intensify the perception of pressure or even contribute to visible bloating – sometimes without excessive gas.

6) Hormonal influences
Many people notice cycle-related changes in digestion, such as water retention or altered gut activity.

7) Eating habits and swallowing air
Eating quickly, large portions, lots of raw foods at once, carbonated drinks, or chewing gum can all increase the bloated feeling.

I underestimated for a long time how much “air” you can introduce completely unintentionally.
Eating fast, talking while eating, a sparkling drink in between – and suddenly the stomach seems to have its own expansion plans.

Food intolerances and allergies – can they play a role?

Yes. Both intolerances and allergies can affect the gastrointestinal tract.

Intolerances usually mean that certain substances are not digested or absorbed well.
Typical consequences can include gas, pressure, diarrhea, or bloating.

Allergies are immune reactions. They don’t only affect the skin or airways, but can also involve the gut.
Possible signs include itching or tingling in the mouth, skin reactions, swelling, or very rapid symptoms after eating.

Other possible factors that are often overlooked:

• Wheat or gluten sensitivity (not always celiac disease)
• Fructose or sorbitol malabsorption
• Histamine intolerance in sensitive individuals
• Irritable bowel syndrome (IBS)
• SIBO (small intestinal bacterial overgrowth – requires medical evaluation)
• Constipation or very irregular bowel movements
• Additives such as inulin or chicory fiber in “high-fiber” products
• Sugar alcohols like xylitol, sorbitol, or maltitol

Plant-based foods that more often cause issues for some people

These foods are generally healthy, but not everyone tolerates them equally well:

• Large amounts of legumes
• Onions and garlic, especially raw
• Cruciferous vegetables such as broccoli, cauliflower, or Brussels sprouts
• Very high-fiber whole-grain products
• “Sugar-free” products containing sugar alcohols
• Highly processed vegan products with many additives
• Very large portions of raw foods

Legumes, in particular, were a long-standing issue for me.
Healthy, plant-based, sustainable – everything right.
But if after eating you feel like you should keep a safe distance from other people, it might be worth reconsidering the portion size.

Often it’s not a single food that matters, but the amount, the combination, or the preparation.

I didn’t learn most of this from textbooks, but through trial and error.
Usually not because I wanted to – but because my stomach made it very clear when something wasn’t a good idea.

Possible approaches that many people find relieving

These points don’t replace medical advice, but can be used as gentle experiments:

1) Simplifying temporarily

• More cooked foods than raw
• Simpler meals with fewer ingredients
• Moderate portion sizes
• Reducing highly processed “high-fiber” products

2) Introducing legumes carefully

• Start with small amounts
• Red lentils are often better tolerated
• Rinse canned legumes thoroughly
• When cooking from scratch: soak and cook until very soft

3) Paying attention to everyday factors

• Eat more slowly and chew thoroughly
• Reduce carbonated drinks
• Light movement after meals
• Warmth for pressure or cramping

When medical clarification is important

Please seek medical evaluation if any of the following symptoms are present:

• severe or worsening pain
• unintentional weight loss
• blood in the stool
• fever
• symptoms that wake you at night
• sudden, significant changes in symptoms

Persistent symptoms should always be taken seriously – regardless of diet.

In summary

• Bloating can have many different causes
• A plant-based diet doesn’t affect everyone the same way
• Intolerances, allergies, stress, and hormones can all play a role
• Observing, simplifying, and testing step by step is often more helpful than cutting everything out

One of the most important things I’ve learned is this: my stomach doesn’t need a perfect nutrition system.
It needs attention, patience – and sometimes simply less ambition on the plate.

And yes: it’s completely okay to question things, even when they’re officially considered “healthy.”
Because in the end, healthy isn’t what looks good on paper – it’s what actually feels good in your own body.