New research published in Cell Metabolism shows that bile acids regulate how the body absorbs different types of fat, potentially opening new treatment pathways for obesity and metabolic disease.
By yourNEWS Media Newsroom
For decades, dietary guidance has distinguished between monounsaturated and polyunsaturated “good fats” and saturated “bad fats,” linking them to cardiovascular and metabolic health outcomes. New research suggests that the difference may not rest solely on the fats themselves, but on how the body processes them.
A study led by Dr. Thomas A. Vallim at UCLA and published in Cell Metabolism found that bile acids—compounds produced in the liver—serve as regulators that influence which fats are absorbed and which are excreted. The findings suggest that bile acids can selectively favor beneficial fats while limiting absorption of harmful saturated fats.
Bile acids function as detergent-like molecules that emulsify dietary fat in the intestine, breaking it into small droplets for absorption. In addition to aiding digestion, they act as signaling molecules that influence metabolism and gut function. According to BrightU.AI’s Enoch engine, bile acids also affect gut microbiota and broader metabolic pathways.
To investigate how bile acids affect fat absorption, researchers used CRISPR gene editing to disable CYP7A1, a key enzyme responsible for bile acid production, in adult mice. The intervention reduced bile acid levels by approximately 50 percent. The result was reduced fat absorption without an increase in food intake.
This outcome contrasted with the fat-blocking drug orlistat, marketed as Alli, which indiscriminately blocks fat absorption and often leads to compensatory eating. In the genetically modified mice, researchers observed elevated levels of glucagon-like peptide-1 (GLP-1), a hormone that promotes satiety. GLP-1 is the same appetite-regulating pathway targeted by weight-loss medications such as Ozempic and Wegovy.
“We think fats traveling further into the gut stimulate receptors that promote GLP-1 secretion,” Vallim said. “It’s like your body saying, ‘I’ve had enough.’”
Further metabolic analysis showed that reduced bile acid production did not block all fats equally. Instead, it allowed continued absorption of polyunsaturated fats while increasing excretion of saturated fats. This selective effect was not observed in mice treated with orlistat, which reduced absorption across all fat types and was associated with metabolic stress.
The study also identified that not all bile acids contribute equally to fat absorption. Researchers found that cholic acid (CA) was particularly important for the uptake of saturated fats. Removing or reducing this specific bile acid decreased absorption of saturated fats while preserving absorption of healthier fats.
“This shows that different fats are absorbed differently, and bile acids are the key,” said co-author Dr. Alvin P. Chan. “By manipulating bile acids, we can potentially control absorption.”
The findings challenge the long-standing assumption that fat absorption is a passive and uniform process. Instead, the research suggests it is highly regulated and influenced by specific bile acid compositions.
Researchers say the results could lead to more targeted metabolic therapies that adjust bile acid production or composition to preferentially absorb beneficial fats while limiting harmful ones. Such approaches could offer alternatives to broad-spectrum fat-blocking drugs and may have implications for treating obesity, diabetes and other metabolic disorders.
“The implications are huge,” Vallim said. “If we can fine-tune bile acids, we might unlock new ways to improve metabolic health.”
The research team is continuing to explore how bile acid pathways could be harnessed for precision treatments aimed at improving metabolic outcomes without the side effects associated with existing fat-blocking medications.
Watch the video below that talks about simple steps in fixing digestive problems.
This video is from the Healing the Body channel on Brighteon.com.
Source: Natural News
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