Research indicates that sorbitol, a widely used sugar substitute in sugar-free products, may increase the risk of liver disease. A recent study published in Science Signalling reveals that the sweetener could contribute to metabolic dysfunction-associated steatotic liver disease (MASLD) by facilitating the accumulation of harmful fat within the liver.
The study, which involved experiments on zebrafish, examined the effects of disrupted gut microbiomes on sorbitol metabolism. It found that when beneficial gut bacteria were eliminated using antibiotics, sorbitol levels surged. This accumulation led to the development of fatty liver disease, even when the fish were on a regular diet. The detrimental effects were further exacerbated when sorbitol was directly added to their food.
According to lead researcher Dr. Gary Patti, sorbitol is “one transformation away from fructose,” a sugar known for fueling cancer cell activity and promoting fatty liver conditions. Normally, the body produces small amounts of sorbitol during digestion, which is effectively managed by the gut microbiome. However, Dr. Patti cautioned that without a healthy balance of bacteria, sorbitol can bypass degradation processes and enter the liver.
This research raises concerns for individuals with balanced gut bacteria as well. Excessive intake of glucose or sorbitol can overwhelm these microbes, allowing sorbitol to reach the liver where it can transform into a fructose derivative, contributing to fat accumulation. The study concluded that high levels of sorbitol consumption “may pose a risk for the development of MASLD.”
The findings emerge amidst growing scrutiny over artificial sweeteners. While some experts argue that sugar substitutes are preferable to sugar, the notion that they pass harmlessly through the body is now being questioned. The potential implications for public health are significant, given that MASLD, previously known as non-alcoholic fatty liver disease, currently affects up to one in five individuals in the United Kingdom. Experts worry that the actual prevalence may be even higher.
As consumers increasingly turn to sugar-free alternatives, the study serves as a reminder to approach these products with caution. The research underscores the importance of understanding how such sweeteners can interact with bodily processes, prompting a reevaluation of dietary choices in the context of liver health.
