Prebiotics are food for the good microbes in the gut, and there are several types that people mix up · This article sums up the main types, how they differ, and how to start taking them without bloating
Prebiotics are dietary fibers/substances that the good microbes in the gut use as food, unlike probiotics, which are the microbes themselves · When good microbes digest prebiotics, they produce substances that are beneficial to the gut (postbiotics) · There are several types of prebiotics with different properties
1 The main types
| Type | Characteristics |
|---|---|
| Inulin | From chicory root/plants, commonly found, feeds bifidobacteria |
| FOS (fructo-oligosaccharides) | Short-chain, ferments quickly, may produce gas in large amounts |
| GOS (galacto-oligosaccharides) | Found in breast milk/infant formula, feeds bifidobacteria |
| PHGG / psyllium | Gentle dietary fibers, less gas |
2 How to choose and get started
- Start gradually, a little at a time — increasing too fast causes bloating/gas in the early period
- Drink enough water
- Pair with probiotics (synbiotic) for more complete gut care
⚠️ It is a dietary fiber / dietary supplement, not a medicine
3 Who should be careful
People with an easily sensitive gut (IBS) or who are sensitive to the FODMAP group may get gas/bloating from inulin/FOS and should choose a gentle type and start with a small amount · Consult a specialist if symptoms are significant
4 Frequently asked questions (FAQ)
How do prebiotics differ from probiotics?
Prebiotics are food for good microbes, while probiotics are the microbes themselves. The two work to complement each other.
Which type of prebiotic is best?
There is no single best type for everyone. People with a sensitive gut may be better suited to gentle types (PHGG/psyllium) than to inulin/FOS.
What should I do if I get bloated after taking them?
This is normal during the adjustment period. Increase gradually and drink water. If the bloating is severe, try changing the type or reducing the amount.
Should I take them together with probiotics?
They help probiotics work better, so synbiotic products that combine both give more complete gut care.
- Dietary supplements are not medicines — they have no effect in preventing, alleviating or treating disease; they are only an aid to looking after your health
- People with chronic conditions or who take regular medication should consult a doctor/pharmacist before use, because there may be interactions
- Pregnant and breastfeeding women should consult a doctor first
- People with an easily sensitive gut (IBS) may get gas from inulin/FOS — choose a gentle type and start with a small amount
References
- Review on the types of prebiotics.
💡 Looking for some support? Read next: Pre/probiotics: how to choose 👉