TUDCA (Tauroursodeoxycholic acid) is a bile salt that occurs natural in the human body. It is primary used to promote bile flow in your liver. Healthy bile flow has a domino effect that may help support many different areas of your overall health. Just like removing logs that would jam up a river TUDCA helps clear up bile from your liver ducts. This helps refresh your liver and promotes healthy liver function. The domino effect from clearing away liver bile also helps support heart immune brain intestinal and thyroid health. Double Wood's TUDCA is manufactured and tested for safety right here in the USA.