Galium aparine, commonly known as cleavers, an annual herb native to Europe, North Africa, and temperate Asia that thrives in cool, moist climates and hedgerows, and is now widely naturalized in North America. The fresh aerial parts are bright green with a mild, grassy aroma and slightly bitter taste. Cleavers was traditionally used as a lymphatic and urinary supportive herb offering mild diuretic,
anti-inflammatory, immunomodulatory properties. Its notable constituents include iridoid glycosides such as asperuloside, as well as flavonoids, phenolic acids, tannins, and polysaccharides, contributing to its activity. It is commonly used for swollen/tender lymph nodes, mild edema, urinary tract irritation, and inflammatory skin conditions such as acne. A 2020 study evaluating an aqueous extract of Galium aparine demonstrated its significant antioxidant activity and immunostimulatory effects through enhanced lymphocyte response, supporting its traditional use in inflammatory and lymphatic contexts PMID: 32824103. Historically, cleavers was used in folk medicine as a spring tonic for clearing winter stagnation and its clinging nature inspired folklore associations with attachment and fidelity. Its roasted seeds were used as a coffee substitute.