Is Sonic Blackberry Zero-Sugar Syrup High in Histamine?

Sonic Blackberry Zero-Sugar Syrup

Low histamine

This zero-sugar syrup is low in histamine, built from citric acid, sweeteners, and carrot extract for color.

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.

This is a flavored drink syrup made of citric acid, cellulose gum, sucralose, carrot extract for color, and a touch of silicone.

No histamine drivers flagged — none of the ingredients here are aged, fermented, cured, or classic liberators, so nothing pushes the level up.
A simple sweet add-in — the sweeteners and gums are just there for taste and texture, and the carrot extract is only for color, so the whole thing reads as low.

This one is an easy pick as a low-histamine flavor add for your drink.

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 Blackberry Zero-Sugar Syrup 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.