Is Starbucks Egg, Pesto & Mozzarella Sandwich High in Histamine?

Starbucks Egg, Pesto & Mozzarella Sandwich

High histamine

This sandwich is high in histamine from several aged cheeses, mirin, yeast extract, and lemon.

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.

Dairy Gluten DAO Blocker Histamine Liberator

This is a warm sandwich with egg, cheddar, monterey jack, gruyère, and mozzarella cheeses plus a kale-basil pesto on a wheat roll.

Cheddar, gruyère, yogurt, and mirin — the aged cheeses and cultured yogurt carry high histamine, and mirin is a fermented rice wine that both runs high and blocks DAO.
Yeast extract and lemon juice concentrate — yeast extract runs high, lemon is a classic liberator, and the wheat and monterey jack add moderate layers.

With so many high drivers stacked here, this one is hard to bring down, so a plainer choice works better.

This rating comes from Starbucks' own published ingredient statement, read on August 10, 2026. Restaurant recipes vary by location and change over time, so always check the current listing: source 1, source 2. How we rate foods →

Starbucks Egg, Pesto & Mozzarella Sandwich and Starbucks 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.