Is Sonic Fresh Brewed Unsweet Tea High in Histamine?

Sonic Fresh Brewed Unsweet Tea

Moderate histamine

This is plain fresh-brewed black tea, which lands moderate because true tea is a listed DAO inhibitor.

Fast food is cooked in batches and held warm rather than made when you order it, so it is rarely as fresh as something cooked at home. That matters here because histamine builds up as protein foods sit, which means the same item can affect you differently depending on how long it waited.

DAO Blocker

This is simply fresh-brewed black tea over ice with no sweetener.

Black tea — it sits in SIGHI's restricted column and is marked as a possible DAO blocker, so it may slow how your body clears histamine from the rest of your meal.
Nothing else added — there are no fermented or aged components here, so the tea leaves are the whole reason for the rating.

For a gentler choice, a caffeine-free herbal drink or plain water sidesteps the DAO concern.

This rating comes from Sonic's own published ingredient statement, read on August 23, 2026. Restaurant recipes vary by location and change over time, so always check the current listing: source 1, source 2. How we rate foods →

Sonic Fresh Brewed Unsweet Tea and Sonic are trademarks of their respective owners. This page is an independent histamine reference and is not affiliated with, endorsed by, or sponsored by the brand.