Deoxycholic acid

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Deoxycholic acid is a bile acid made by the liver and further modified by bacteria in your gut. It is one of the “secondary” bile acids formed when intestinal bacteria convert other bile acids. Its main job is to help digest fats by emulsifying them so they can be absorbed.

What it looks like and how it’s used
- In the body it acts as a detergent-like molecule. It can dissolve fats, which helps digestion.
- It appears as a white to off-white crystalline powder and can dissolve in alcohol.
- In medicine, a synthetic form is sold under the brand name Kybella (and other names) to reduce fat under the chin. When injected into submental fat, it destroys fat cells, which the body then removes over a period of months.
- In the lab, deoxycholic acid (often as sodium deoxycholate) is used as a detergent to break apart cell membranes and solubilize membrane components. It has also been explored as an emulsifier in foods and as a tool in vaccine development and protein research.

Health and diet connections
- Diet and obesity can raise the amount of deoxycholic acid in the colon. High-fat diets and eating meat, eggs, and cheese can increase its level in feces.
- Higher colonic deoxycholate has been linked in some studies to a greater risk of colon cancer, while other factors like exercise can reduce its levels. For example, people who are more physically active tend to have lower fecal levels of deoxycholic acid.
- Some animal studies suggest that curcumin (from turmeric) and caffeic acid can lower deoxycholate levels even on a high-fat diet. Coffee contains chlorogenic acid, which may have a protective effect in these studies.
- Obesity and the gut bacteria balance can influence how much deoxycholic acid is produced. In general, gut bacteria that convert primary bile acids into secondary ones like deoxycholic acid can be more active in people with higher fat intake or obesity.

Biology and signaling
- Deoxycholic acid can interact with cellular enzymes and signaling pathways, including those that release endocannabinoids, which are involved in appetite, pain, and stress responses.
- Some research suggests deoxycholic acid may play a role in immune and inflammatory processes, but its full effects on health are complex and depend on many factors.

Bottom line
Deoxycholic acid is a natural, fat-dissolving bile acid produced in the liver and shaped by gut bacteria. It has practical medical uses (such as reducing chin fat) and important roles in digestion and cellular biology. However, high levels—often influenced by diet and obesity—are associated with increased risks in the colon in some studies. Lifestyle factors like regular exercise and a balanced diet can help manage its levels.