6. Eggplant
Eggplant is a species of nightshade. It is a fruit, not a vegetable. It contains 26 mg/kg of histamine. Though it contains histamine, the health benefits outweigh it. It has an antioxidant. it is rich in fiber, vitamins and minerals. A little caution in the consumption of this fruit for those who have histamine intolerance.
7. Ketchup
Ketchup is a savory sauce used as an ingredient or condiment. It is often partnered with french fries and used as a dipping sauce. It contains 22 mg/kg of histamine. Consuming it in small amounts is not risky. Besides, has anyone ever seen someone gulping a bottle of ketchup? Unless you are doing that, there is no need to worry about allergies.
