Make brewing beer easier with Five Star Chemicals Lactic acid 88% solution pH adjuster/flavor additive 1 gallon. Using food-grade lactic acid is a simple way to lower your pH during brewing and can be added at various stages of the brewing process, making it a convenient and flexible option. Lactic acid is also an effective flavor additive. Its tangy flavor makes it ideal for brewing sour beers. The compact 1-gallon container is great for smaller establishments with minimal storage space. This dual-purpose lactic acid will help to ensure consistent, great-tasting beer.