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walnuts
Nuts & Seeds
Is walnuts high in sulfites?
Is walnuts high or low in sulfites? See its exact rating, how much counts as a portion, and its FODMAP, salicylate, oxalate and diet compatibility in one place.
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Sensitivity notes
Why sulfites food checker matters
Sulfites are preservatives found in wine, dried fruits, and processed foods. They can trigger asthma symptoms, headaches, and allergic reactions in sensitive individuals.
- Dried fruits are often high in sulfites unless labeled 'unsulfured'
- Wine, especially white, commonly contains sulfites
- Fresh foods are naturally sulfite-free
- Check medication labels - some contain sulfites
- Look for 'contains sulfites' on labels (required above 10ppm)
Sensitivities
What walnuts contains
FODMAPs
Histamine & Amines
Plant compounds
Irritants
Additives
Allergens
Diet fit
Where walnuts fits
Therapeutic diets
Lifestyle diets
Religious diets
What to know about walnuts
Walnuts are genuinely anti-inflammatory thanks to their plant omega-3s, but they are also very high in oxalate and high in nickel, so the same handful that is good for your heart can be a real problem if you are prone to kidney stones or have a nickel allergy. That trade-off, a strong nutrition upside sitting on top of two clear triggers, is what sets walnuts apart from a plain snack nut.
Watch for
- Very high in oxalate, one of the higher-oxalate nuts, worth limiting if you are managing calcium-oxalate kidney stones
- High in nickel, a common flare trigger for people with systemic nickel allergy (nut, seed and wholegrain foods tend to be nickel-rich)
- A tree nut, so a top allergen and not eosinophilic-oesophagitis friendly if nuts are on your elimination list
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Sulfites Guide
Everything you need to know about sulfites sensitivity and smart food choices.
Sulfites are preservatives found in wine, dried fruits, and processed foods. They can trigger asthma symptoms, headaches, and allergic reactions in sensitive individuals.
Sensitivity varies widely. What triggers one person may be fine for another. Track your reactions to find your personal threshold.
These foods are generally well-tolerated for Sulfites sensitivity:
View all safe options
These foods have moderate levels and may be tolerated in small amounts:
These foods are high in sulfites and may trigger symptoms:
View full list
If you're sensitive to Sulfites, consider these strategies:
- 1Dried fruits are often high in sulfites unless labeled 'unsulfured'
- 2Wine, especially white, commonly contains sulfites
- 3Fresh foods are naturally sulfite-free
- 4Check medication labels - some contain sulfites
- 5Look for 'contains sulfites' on labels (required above 10ppm)
Pro tip: Keep a food diary to track your reactions. The Triggerbites app makes this easy with automatic pattern detection.
Want personalized tracking?
Download Triggerbites to log meals, track symptoms, and discover your unique triggers.
Get the AppFAQ
Is walnuts high in Sulfites?
Sulfites: low signal for most people.
Can I still eat walnuts if I'm sensitive to Sulfites?
Usually fine in normal portions.
What else should I check?
Check Tree Nuts, Oxalates, and AIP next for a fuller picture.