Iced coffee

Iced coffee is just chilled brewed coffee — histamine levels stay low regardless of temperature — but the caffeine and any dairy additions are worth noting.

• Caffeine still active — cold brewing or chilling doesn't reduce caffeine, so the adrenaline-driven effects like flushing or jitteriness that can mimic histamine symptoms are still in play

• Added dairy or creamers — milk-based versions add a dairy variable that some people with histamine sensitivity find they react to; plant-based milks are a straightforward alternative

Checking what's in the mix — especially with café-made iced coffees that often include syrups or creamers — can help you pinpoint what you're responding to.