Root beer

Root beer is flavored with a mix of plant-derived ingredients — traditionally sassafras, vanilla, and various herbs — which makes its histamine impact hard to pin down precisely.

• Flavoring complexity — some herbal and spice-derived flavorings used in root beer (like vanilla extract or certain botanicals) are reported as problematic for histamine-sensitive people, though the evidence varies by recipe

• No fermentation — unlike beer or kombucha, most commercial root beers are not fermented, so they don't carry the histamine load of fermented drinks; the concern is more about individual flavorings

Checking the ingredient list can help identify whether a specific brand uses ingredients you typically react to.