Pho is a traditional Vietnamese noodle soup made with rice noodles, aromatic broth, meat, and fresh herbs. While pho is often considered “light” and easy to digest, people following a low FODMAP diet—especially those with Irritable Bowel Syndrome (IBS)—often ask:
Is pho low FODMAP?
The short answer is: Pho is not automatically low FODMAP, but it can be made low FODMAP with specific ingredient modifications. This article explains the science behind pho’s ingredients, their FODMAP content, and how to enjoy pho safely on a low FODMAP diet.
What Is Pho Made Of?
A traditional bowl of pho typically includes:
- Rice noodles (bánh phở)
- Beef or chicken broth
- Meat (beef or chicken)
- Onion and garlic
- Spices (star anise, cinnamon, cloves, ginger)
- Garnishes (bean sprouts, herbs, lime)
- Sauces (hoisin sauce, chili sauce)
From a FODMAP perspective, the broth and sauces are the main concern.
Is Pho Low FODMAP? (Short Answer)
❌ Traditional pho is NOT low FODMAP
✅ Modified pho CAN be low FODMAP
The determining factor is garlic and onion, which are high FODMAP due to fructans, a type of fermentable oligosaccharide.
FODMAP Analysis of Common Pho Ingredients
1. Rice Noodles
✅ Low FODMAP
Rice-based noodles contain no fermentable carbohydrates and are considered safe in normal serving sizes.
2. Meat (Beef or Chicken)
✅ Low FODMAP
Plain, unprocessed meats contain no FODMAPs, as they are composed of protein and fat.
3. Pho Broth
❌ Usually high FODMAP
Traditional pho broth is simmered with:
- Onion
- Garlic
- Shallots
These ingredients release water-soluble fructans into the broth, making it high FODMAP, even if the solids are removed.
4. Spices (Star Anise, Cinnamon, Cloves, Ginger)
✅ Low FODMAP
Dried spices used in pho are low FODMAP when used in typical culinary amounts.
5. Garnishes
| Ingredient | FODMAP Status |
|---|---|
| Bean sprouts | Low FODMAP |
| Thai basil | Low FODMAP |
| Cilantro | Low FODMAP |
| Lime juice | Low FODMAP |
| Raw onion | ❌ High FODMAP |
6. Pho Sauces
❌ Often high FODMAP
- Hoisin sauce: contains garlic and high-fructose sweeteners
- Chili sauces: often include garlic or onion
Small amounts may be tolerated by some individuals, but they are not considered low FODMAP.
Can Pho Be Made Low FODMAP?
✅ Yes, with proper modifications
A low FODMAP version of pho focuses on controlling fructan exposure, especially from garlic and onion.
Low FODMAP Pho Modifications
- Use garlic-infused oil instead of garlic
- Prepare broth without onion or garlic
- Add ginger and spices for flavor
- Use rice noodles and plain meat
- Avoid hoisin sauce or use a certified low FODMAP alternative
- Garnish with herbs, lime, and bean sprouts
Is Restaurant Pho Low FODMAP?
❌ Usually no
Most restaurant pho broths are prepared with large quantities of onion and garlic and simmered for hours, resulting in high fructan concentration.
Practical tip:
If eating out, ask whether a garlic- and onion-free broth is available (rare), or enjoy pho only during the reintroduction phase in very small amounts.
Scientific Explanation: Why Broth Matters
Fructans are water-soluble carbohydrates. Long simmering times allow fructans from garlic and onion to fully dissolve into broth. Unlike oils, these carbohydrates cannot be removed once extracted, which is why strained broth is still high FODMAP.
This mechanism explains why:
- Garlic-infused oil is safe
- Garlic-infused broth is not
Final Verdict: Is Pho Low FODMAP?
🔬 Scientifically accurate answer:
- Traditional pho is high FODMAP due to garlic- and onion-based broth
- Pho can be low FODMAP if prepared without garlic and onion
✔ Safe on low FODMAP if:
- Homemade or specially modified
- Garlic-free broth
- Rice noodles and plain meat
FAQ
Is beef pho low FODMAP?
Only if the broth is made without garlic and onion.
Is chicken pho low FODMAP?
Same rule applies—broth determines FODMAP content.
Are rice noodles low FODMAP?
Yes, rice noodles are naturally low FODMAP.
Can IBS patients eat pho?
Yes, but only a low FODMAP version or during reintroduction.