Sour Culture

Sour culture is a starter culture used to make sourdough bread. It is made from a mixture of flour and water that has been left to ferment, allowing wild yeasts and bacteria naturally present in the environment to grow. This fermentation process gives sourdough its characteristic tangy flavor and chewy texture.

Manufacturers use sour culture primarily as a leavening agent and for its distinct sour flavor in baked goods. It is most commonly found in breads, rolls, and other yeast-leavened products, contributing to their rise and complex taste profile.

Sour culture is generally recognized as safe (GRAS) by the FDA for use in food. The fermentation process can increase the bioavailability of some nutrients in the flour and may produce beneficial compounds. Regulatory bodies like EFSA have evaluated similar fermentation products, but specific evaluations for sour culture are not widely publicized. Evidence on its health effects at typical consumption levels is limited, but it is considered a natural part of traditional bread-making.