Pho's rice noodles and bone broth can be gluten-free, but soy sauce, hoisin, and broth bases often add wheat, so it depends on how it's made.
Sometimes. The rice noodles and a from-scratch bone broth in pho are naturally gluten-free, but two things often add gluten: soy sauce or a seasoning base cooked into the broth, and the hoisin sauce most people stir in at the table (hoisin is wheat-based). Shared noodle-cooking water is another risk. Pho can be very safe when the broth is verified and you skip hoisin or use a gluten-free one, ask before you order.
A steaming bowl of pho looks like it should be naturally gluten-free, rice noodles, clear broth, herbs. And it can be. But pho has a couple of classic gluten traps that catch celiacs off guard.
The noodles are safe; the sauces and broth base are the question. Here’s how to order pho with confidence.
Why Pho Is a “Sometimes”
Authentic pho is built on rice noodles (bánh phở) and a long-simmered bone broth with aromatics like star anise, ginger, and cinnamon, all naturally gluten-free. So far, so safe.
The gluten usually comes from two places. Soy sauce, used in some broths, is typically made with wheat, and the Celiac Disease Foundation lists it as a gluten source. Many restaurants also use a commercial broth base or bouillon that can contain wheat-derived flavorings. And the hoisin sauce most diners squeeze into the bowl is almost always wheat-based. Under the FDA’s gluten-free labeling rule (21 CFR 101.91), the finished bowl is only gluten-free if every one of those is under 20 parts per million.
Where Gluten Hides in Pho
The noodles are safe; here’s what to watch:
- Hoisin sauce: the brown sauce squeezed in at the table is almost always wheat-based.
- Soy sauce in the broth: regular soy sauce is made with wheat (tamari is the gluten-free version).
- Commercial broth bases: bouillon and concentrates can contain wheat-derived flavorings.
- Shared noodle water: rice noodles cooked in water also used for wheat noodles.
- Fried toppings: fried shallots or wontons can carry wheat.
Cross-Contamination Risk
- Pho kits often include broth packets and sachets with wheat.
- Rice noodles themselves are naturally gluten-free.
- Only kits labeled gluten-free are verified safe.
- Broth may contain soy sauce or a commercial base with wheat.
- Tableside hoisin sauce is almost always wheat-based.
- Rice noodles may share cooking water with wheat noodles.
- Make broth from bones and aromatics, naturally gluten-free.
- Use gluten-free tamari instead of soy sauce.
- Choose certified gluten-free rice noodles and a GF hoisin.
Pho: What to Check Before You Slurp
Each part of the bowl has its own answer.
| Pho Component | Gluten-Free Status | What to Check |
|---|---|---|
| Rice noodles (bánh phở) | ✓ Naturally gluten-free | Confirm 100% rice, no wheat added |
| From-scratch bone broth | ✓ Usually gluten-free | Ask if soy sauce or a base is used |
| Broth with soy sauce or a base | ⚠ Ask first | Regular soy sauce and bases contain wheat |
| Hoisin sauce (tableside) | ✗ Usually not safe | Almost always wheat-based |
| Sriracha | ✓ Usually gluten-free | Most major brands are GF; verify |
| Fried shallots / wonton garnish | ⚠ Check | May be dusted with or contain wheat |
What to Look For or Avoid
- 100% rice noodles with no added wheat
- Broth confirmed to be made without soy sauce or a wheat base
- Gluten-free tamari in place of soy sauce
- Sriracha or a gluten-free hoisin instead of regular hoisin
- Tableside hoisin sauce (almost always wheat)
- Broth from a commercial base, or shared noodle-cooking water
Frequently Asked Questions
Quick answers to the questions people ask most about pho and gluten. The short version: the rice noodles are safe. It’s the broth’s soy or base and the tableside hoisin you check.
Is pho gluten-free?
Sometimes. The rice noodles and a from-scratch bone broth are naturally gluten-free, but pho often contains gluten from soy sauce or a commercial base in the broth, and from the hoisin sauce diners add at the table. Pho is safe when the broth is verified gluten-free and you skip the hoisin or use a gluten-free one, so ask how it’s made.
Are the rice noodles in pho gluten-free?
Yes, when they’re 100% rice. Pho noodles (bánh phở) are traditionally made from rice and water, which are naturally gluten-free. Occasionally noodles have added wheat or share cooking water with wheat noodles, so confirm they’re pure rice and cooked separately.
Is the hoisin sauce in pho gluten-free?
Usually not. Hoisin sauce, the thick brown sauce squeezed into the bowl, is almost always made with wheat. Even if the broth is gluten-free, adding standard hoisin makes the bowl unsafe. Skip it, bring a gluten-free hoisin, or stick to sriracha, which is usually gluten-free.
Does pho broth contain gluten?
It can. A traditional bone broth is gluten-free, but many restaurants add soy sauce (usually made with wheat) or use a commercial bouillon or base that contains wheat-derived flavorings. Ask whether the broth is made from scratch and whether any soy sauce or base is used.
Is soy sauce in pho a problem for celiacs?
Yes. Regular soy sauce is made with wheat and is a common hidden gluten source, and some pho broths include it. The gluten-free alternative is tamari. Ask whether the broth contains soy sauce, and at home use gluten-free tamari instead.
How do I order pho safely with celiac disease?
Ask whether the broth contains soy sauce or a soup base, and request it without if possible. Confirm the rice noodles are pure rice and cooked separately. Skip the tableside hoisin (or use a gluten-free one), and flavor your bowl with lime, herbs, bean sprouts, and sriracha instead.
Can people with celiac disease eat pho?
Yes, when it’s prepared carefully. Pho made with a from-scratch broth (no soy sauce or wheat base), pure rice noodles, and gluten-free condiments is a great celiac-friendly meal. The key is verifying the broth and avoiding the wheat-based hoisin most restaurants set on the table.