Burdock Root (Arctium lappa) is a good source of nutrients to help build the body. It is a good herb to use during pregnancy. Burdock is a good herb to use during pregnancy. It helps prevent water retension and jaundice in babies. It is an excellent blood purifier and cleanser and eliminates long term impurities from the blood. Burdock can reduce swelling around joints by promoting kidney function, thus increasing urine flow. Maintains hormonal balance and is a good source of iron.