From ancient times through World War I, garlic has been used to treat the wounded. During the 1920s, researchers at Sandoz Pharmaceuticals in Switzerland isolated garlic's antibiotic compound, alliin, which has no medicinal value until the herb is chewed, chopped or crushed. Then an enzyme transforms alliin into a powerful antibiotic called allicin. Modern antibiotics are more potent and easier to take (just try chewing a dozen raw cloves), but if you're concerned about ulcers, use more garlic in your diet. Researchers at the University of Washington have shown that garlic kills H. pylori, the bacteria that cause ulcers. Raw garlic has the most antibiotic potency, but garlic still has benefits when cooked.
