This herbal panacea has long been used in many cultures for infections, worms, and as an antibiotic and antiseptic. More recently, garlic has been discovered to lower blood cholesterol levels and blood pressure, reduce the clotting activity of blood platelets, and to have antitumor activity. Additionally it is useful as a preventative for vascular changes common to the elderly. It has a beneficial expectorant, warming effect on the lungs and is used for bronchial and pulmonary infections, pneumonia, colds, and flu. Allicin has shown antifungal activity against Candida. In China, garlic is commonly used as a worm remedy, as a detoxifying agent, and to prevent and treat influenza.