walnuts
Nuts & Seeds
Trigger checker for walnuts
See walnuts rated across every trigger — FODMAP, histamine, salicylate, oxalate, tyramine and more — plus diet compatibility, all in one quick ingredient profile.
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Triggers
Diets
Serving size, prep, and portion notes for 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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FAQ
What does the FODMAP rating mean for walnuts?
Medium FODMAP: portion size matters more than the ingredient itself.
Is walnuts generally well tolerated?
Oxalates (Avoid) and Nickel (High) Start with those if you react.
What should I check next?
Compare within the Nuts & Seeds group.