Allicin is a sulfur-containing compound derived from garlic (Allium sativum) and is responsible for its characteristic aroma and many health benefits. It is formed when garlic is crushed or chopped, activating the enzyme alliinase, which converts alliin to allicin. Allicin exhibits antimicrobial, antifungal, and antioxidant properties, making it significant in culinary applications and traditional medicine. Its pungent flavor enhances various dishes, while its health benefits include potential cardiovascular protection and immune system support.