Mezzetta Kalamata Olives

Yes, kalamata olives are a high-histamine food, and this kind of jarred, brined olive is one to approach with real caution. Olives are cured and brined before they reach the jar, and that curing process is exactly the kind of microbial activity that builds histamine.

Why mezzetta kalamata olives is rated high

Kalamata olives don't go from tree to jar. They spend weeks or months curing in brine, and that slow soak in salty liquid is where bacteria act on the olive over time, which is the same kind of process that raises histamine in other cured and brined foods. On top of that, jarred olives of this style are often packed with a wine-based vinegar, which not only tends to run high in histamine itself but can also slow down DAO, the enzyme your body uses to clear histamine. So an olive like this can be a double hit: it carries histamine, and it may make the rest of your meal harder to process.

What changes your risk

• Amount — a few olives are still a meaningfully sized dose of a cured, brined food, and there isn't a portion that reliably sidesteps the issue for this kind of product.
• What you eat it with — because the vinegar-style pack can slow DAO, olives eaten alongside other histamine-containing foods may make that whole plate hit harder than the olives alone would suggest.
• The pack liquid — brine and any wine-based vinegar in the jar are part of the picture, so dressings, tapenades, or dishes that use the liquid carry it through too.
• How long it's been open — once opened, jarred olives sit in their brine in the fridge, and that ongoing storage in a salty, previously-cured food gives no reason to expect the histamine to drop.
• Curing is fixed — the olive was already cured before you bought it, so no rinsing, cooking, or draining at home undoes the histamine that formed during curing.

Lower-histamine alternatives

There isn't a truly low-histamine version of a cured olive, since curing is what makes an olive edible in the first place. If you're after a salty, savory bite in a salad or on a plate, fresh cooked vegetables with olive oil and fresh herbs get you closer to the flavor without the cured-and-brined problem. A drizzle of plain olive oil gives you some of the same rich, briny mouthfeel that people often want from olives, without the fermentation or vinegar behind it.

How to lower the risk

For most people with histamine intolerance, jarred kalamata olives are a food to leave on the shelf rather than one to buy and manage carefully. If they're in a dish someone else has made, remember the flavor tends to spread through the whole plate via the brine and oil, so a tapenade, dressing, or Greek-style salad usually carries the same concern as the olives themselves. When you want that Mediterranean, salty-savory feel at home, build it from fresh cooked vegetables, good olive oil, and fresh herbs instead.

Common questions

Are green olives lower in histamine than kalamata?

Both are cured and brined, so both run high. The color and variety don't change the fact that curing is the process that builds histamine, so green olives aren't a safe swap for kalamata.

Does rinsing the olives help?

Rinsing washes off surface brine but does not remove histamine that formed inside the olive during curing, so it doesn't make them a low-histamine food.

Why do olives get called a DAO blocker?

The wine-based vinegar often used to pack olives like these can slow DAO, the enzyme that clears histamine. That means olives may make an otherwise okay meal hit harder, on top of the histamine they already carry.

Is olive oil a problem too?

Plain olive oil is generally fine and is not the same as the cured olive itself. The concern is the brined, cured fruit and any vinegar in the jar, not the oil pressed from olives.