Usnic Acid

Usnic acid is a naturally occurring bioactive compound found in lichens, such as *Usnea* and *Cladonia* species. Known for its distinct yellow-green color and antimicrobial properties, it has been traditionally used in folk medicine for wound care and immune support. Modern research highlights its potential as an antibacterial, antifungal, and anti-inflammatory agent, though further clinical studies are needed to validate efficacy and safety. This compound works by disrupting cellular metabolism in certain microbes, making it a subject of interest for topical applications. However, oral consumption requires caution due to potential liver toxicity at high doses. Usnic acid is commonly incorporated into creams, ointments, and supplements, often paired with other natural extracts for synergistic effects. As a niche ingredient, it appeals to those seeking plant-based alternatives. Always consult a healthcare professional before use, especially if pregnant, nursing, or taking medications.