Garlic is a perennial plant that is cultivated and does not occur in the wild. Known, for its full, strong flavor, it is commonly used to season foods while cooking. The bulb of the plant is used in cooking and for medicinal purposes. Garlic has been used in the treatment of high cholesterol, heart disease, and high blood pressure. While garlic has also been used to reduce the risk of certain cancers, this effect has not been evaluated thoroughly in clinical trials. While garlic contains numerous substances, alliin is responsible for the majority of garlicâ€™s health benefits. Doses of garlic vary and depend upon the type of preparation and the condition being treated. While garlic is generally considered to be safe, side effects with garlic use include breath/body odor, heartburn, and upset stomach. Garlic may have effects on blood clotting, and should not be used by people taking the blood thinner warfarin. Garlic may alter the effectiveness of drugs used to treat cancer, diabetes, high cholesterol, and high blood pressure. Discuss garlic with your healthcare provider before using.