Overview
About hazelnut
Hazelnuts are one of the highest-nickel tree nuts, which is the main reason they trigger people even when other snacks feel fine.
They are moderate on FODMAPs (from galacto-oligosaccharides) and only mildly histamine-raising, so a small handful is usually tolerated, but chocolate hazelnut spreads, gianduja and praline concentrate them and are a common flare culprit. As a major tree-nut allergen they also hide inside a lot of baked goods.
Sensitivities
How hazelnut scores
Watch for
What trips people up
- High in nickel, the strongest trigger here, which matters if you have systemic nickel allergy: chocolate-hazelnut spreads and pralines pack a lot of hazelnut into one serving
- Moderate FODMAP load from galacto-oligosaccharides, so a few nuts are fine for most but a jar of spread or a bag of them can bloat a sensitive gut
- Mildly histamine-active, and roasting or long storage tends to push that higher
- A major tree-nut allergen that hides in praline, gianduja, nut flours and many desserts
Diet fit
Where it fits
Swap ideas
More alternatives
FAQ
Common questions about hazelnut
Are hazelnuts high in nickel?
Yes. Hazelnuts sit among the highest-nickel tree nuts, so they are a frequent trigger for people with systemic nickel allergy. The problem is often dose: a chocolate hazelnut spread or a handful of pralines delivers far more hazelnut, and therefore more nickel, than a couple of whole nuts.
Why does chocolate hazelnut spread trigger me when a few nuts do not?
Spreads like Nutella and gianduja are concentrated hazelnut plus cocoa, and cocoa is itself high in nickel. A tablespoon or two stacks two nickel-rich foods together, which can tip you over your threshold even if a small serving of whole hazelnuts was fine.
Are hazelnuts low FODMAP?
In a small serving they are close to low FODMAP, but they carry galacto-oligosaccharides that build up quickly. A modest handful is usually tolerated on a low-FODMAP plan, while larger amounts or hazelnut-heavy spreads can cause gas and bloating.
References
Read the background
Ratings reflect the Triggerbites ingredient database and may vary with portion size and preparation.