Dandelion herbal Â supports liver and kidney function, and is indicated for liver diseases.Herbal tonics are highly concentrated medicinal herbs cooked and extracted to provide the highest potency for optimal health. These tonics are special brews that are used over long periods of time to promote radiant health. Not used for acute conditions. Tonics provide nutrients that enhance the natural process of organic function. The tonics may be diluted in hot water: fifteen drops of tonic in four ounces of hot water and sip daily.