Potato chips

Potatoes themselves are well-tolerated, and frying doesn't meaningfully raise histamine levels.

• Plain salted chips — these tend to be straightforward, with just potato, oil, and salt — nothing that typically accumulates histamine or blocks its breakdown

• Seasoned flavors — vinegar-based, cheese, or BBQ varieties often include ingredients (like yeast extract or vinegar) that are more likely to cause issues

Sticking to simply salted chips, or checking ingredient lists on flavored ones, is a helpful habit.