: lemon juice
Rich in vitamin C and citric acid, lemon juice provides minimal calories while delivering potent antioxidants and aiding mineral absorption through its acidity.
About
Lemon juice is the liquid extract of the lemon (Citrus limon), a small, yellow citrus fruit native to Southeast Asia and now cultivated worldwide in temperate and subtropical climates. The juice comprises approximately 5-8% citric acid by weight, giving it its characteristic tart flavor, along with malic acid and ascorbic acid. Fresh lemon juice is typically extracted from the fruit's flesh using a press, reamer, or citrus juicer, and ranges in color from pale yellow to golden depending on ripeness and variety.
The juice's acidity and brightness define its culinary application. Key juice-producing varieties include Eureka and Lisbon lemons, which yield reliable juice content and balance of acid and sweetness. When freshly squeezed, lemon juice exhibits pronounced aromatic compounds (limonene and citral), which volatilize quickly; bottled and concentrated versions sacrifice some aromatic complexity for shelf stability.
Culinary Uses
Lemon juice functions as an essential acidic ingredient across virtually all culinary traditions, used to brighten flavors, balance richness, and prevent oxidation. It is fundamental to Mediterranean, Middle Eastern, and Asian cuisines, appearing in vinaigrettes, marinades, seafood preparations, sauces (such as beurre blanc and hollandaise), and beverages. In preservation, it acidifies canned goods and pickles. Lemon juice is employed both during cooking and as a finishing element to enhance complexity without adding fat or sodium. Its acidity chemically denatures proteins, making it useful in ceviches and other raw fish preparations. Pairing lemon juice with fatty proteins, creamy sauces, and vegetables amplifies perceived freshness and complexity.