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Inulin vs Psyllium - which fibre is better for your gut?
When it comes to gut health, two popular fibre types often come up: inulin and psyllium husk. Both are widely used in the UK to support digestion, reduce bloating and help with IBS symptoms - but they work in very different ways.
So which one is better? The answer depends on your needs.
What is inulin?
Inulin is a prebiotic fibre, meaning it feeds the good bacteria in your gut microbiome.
- Found naturally in chicory root, garlic, onions and leeks
- Supports healthy gut bacteria
- Improves digestion over time
- May support immune health
Best for:
Long-term gut health and microbiome balance.
Possible side effects:
- Bloating and gas (especially at the beginning)
- Not always suitable for low FODMAP diets
What is psyllium husk?
Psyllium is a soluble fibre that absorbs water and forms a gel in the digestive system.
- Helps regulate bowel movements
- Effective for constipation and diarrhoea
- Supports heart health (cholesterol levels)
- Gentle on sensitive digestion
Best for:
Quick digestive support and IBS symptoms.
Important:
- Always take with plenty of water
Inulin vs psyllium – key differences
| Feature | Inulin | Psyllium |
|---|---|---|
| Type of fibre | Prebiotic | Soluble (bulk-forming) |
| Main benefit | Feeds gut bacteria | Improves bowel movement |
| Speed of effect | Slow | Fast |
| IBS suitability | Sometimes problematic | Usually well tolerated |
| Bloating risk | Higher | Low |
Which fibre should you choose?
Choose inulin if:
- You want to improve gut microbiome
- You focus on long-term health
- You tolerate prebiotic fibres well
Choose psyllium if:
- You need quick relief from constipation or diarrhoea
- You have IBS or sensitive digestion
- You want a gentle, reliable solution
Can you take inulin and psyllium together?
Yes - combining both can give the best results:
- Psyllium improves bowel movement
- Inulin feeds beneficial bacteria
Start with small amounts and increase gradually.
FAQ
Is inulin better than psyllium?
No — they serve different purposes. Inulin supports gut bacteria, while psyllium improves digestion directly.
Is psyllium good for IBS?
Yes, psyllium is one of the most recommended fibres for IBS.
Does inulin cause bloating?
It can, especially if taken in large amounts.
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