Blue cheese

Blue cheese is one of the highest-histamine foods you can eat, so it's usually a food to avoid on a histamine-intolerance diet. It's aged for weeks or months with mold and bacteria, and that ripening process is exactly what builds up histamine.

Why blue cheese is rated high

The sharp, tangy, funky flavor of blue cheese comes from long aging with Penicillium mold and bacterial cultures. As those microbes break down the cheese's proteins over time, they leave behind a lot of histamine as a byproduct. The longer and more intensely a cheese is ripened, the more histamine tends to pile up, and blue-veined cheeses are among the most heavily aged of all. There is nothing wrong with the milk it started as; it's the weeks of ageing that make blue cheese a problem for many people with HIT or MCAS.

What changes your risk

• Age of the cheese — the whole point of blue cheese is long ripening, so unlike a mild cheese there's no young, fresh version that dodges the issue. More aging generally means more histamine.
• How strong it tastes — the sharper and funkier the flavor (think a mature Roquefort or Stilton versus a milder blue), the more the microbes have been working, and typically the higher the histamine.
• Storage after opening — an already-fermented cheese sitting open in the fridge can keep changing, and histamine may creep up further, so an old wedge is not gentler than a fresh one.
• Portion size — because levels are so high, even a small crumble on a salad can be enough to cause symptoms for sensitive people; there isn't really a 'safe small amount' rule you can count on.
• Cooking it — melting blue cheese into a sauce or on a burger does not lower the histamine; heat won't break it down.

Lower-histamine alternatives

There is no low-histamine version of blue cheese itself, because the mold and aging are what define it. If you're after a creamy, spreadable cheese, fresh options tend to be much better tolerated: fresh mozzarella, ricotta, mascarpone, or a young cream cheese are the usual go-tos, since they are made and eaten young rather than aged. For that salty, savory punch blue cheese gives a salad, a little fresh mozzarella with olive oil and fresh herbs is a gentler swap. Keep in mind other blue-style and heavily aged cheeses (gorgonzola, Roquefort, Stilton, aged cheddar, parmesan) are in the same high-histamine boat.

How to lower the risk

The most practical move here is simply to skip blue cheese and its cousins, since the whole category is built on aging. If you're building a cheese board or a salad you can still enjoy, reach for the freshest cheeses you can find, buy them close to their make date, and store them well sealed and cold. When eating out, blue cheese hides in dressings, dips, and on steaks, so it's worth asking. If you're testing your own tolerance, do it cautiously with a tiny amount on a calm day, but many people with HIT find this one just isn't worth the risk.

Common questions

Is blue cheese one of the worst cheeses for histamine?

Yes. Blue-veined cheeses are consistently among the highest-histamine cheeses because of the intense mold ripening and long aging they go through.

Does cooking or melting blue cheese make it safer?

No. Heat doesn't destroy the histamine already in the cheese, so a melted blue cheese sauce is just as much of a problem as the cold crumbles.

Is gorgonzola or Roquefort any better than blue cheese?

Not really. Gorgonzola, Roquefort, and Stilton are all mold-ripened blue-style cheeses, so they sit in the same high-histamine range.

What can I use instead of blue cheese in a dressing?

Try blending fresh cream cheese or fresh mozzarella with olive oil, salt, and fresh herbs for a creamy, savory dressing without the aged-cheese histamine load.