While histamine is naturally found in many different foods, Hamilton explains that histamine levels tend to increase as foods age or ferment: "This means leftovers, aged meats, fermented foods ...

Currently, there is no reliable test available to measure DAO levels and enzyme activity. Many foods contain high histamine levels. If the body is unable to break down this chemical adequately ...

If we over-produce histamine, consume high levels of histamine-rich foods and fail to break it down sufficiently, levels can ...