Researchers have identified a possible link between low testosterone levels, high fructose intake and increased fat accumulation in the liver. The findings suggest that changes in gut bacteria may help explain why these two factors can have a stronger combined effect than either one alone.
The research was conducted in mice, so the results do not yet establish that the same mechanism operates in humans. However, the findings offer a new direction for investigating metabolic dysfunction-associated steatotic liver disease (MASLD), a condition in which excess fat builds up in the liver.
How Hormones and Diet May Affect Liver Health
Fructose is a type of sugar found naturally in fruit and commonly used in sweetened drinks and processed foods. Excessive consumption of added sugars can contribute to metabolic health problems, while low testosterone has also been associated with an increased risk of metabolic disorders.
To investigate how these factors interact, researchers studied male mice with reduced testosterone levels and compared their responses to different diets. They found that the combination of reduced testosterone and a high-fructose diet led to a greater buildup of liver fat than either factor produced on its own.
Gut Bacteria May Help Explain the Link
The team observed changes in the animals’ gut microbiota, the community of microorganisms living in the digestive system. These changes were associated with increased levels of pyruvate in the intestine.
In additional laboratory experiments using liver cells from mice, pyruvate and fructose appeared to work together to promote the accumulation of fats inside the cells. The results point to a possible connection between gut bacteria, sugar metabolism and liver fat storage.
Why Healthy Dietary Habits Still Matter
The findings reinforce the importance of studying how dietary patterns and metabolic health interact. Choosing water instead of sugary drinks more often and following a balanced eating pattern can support overall health, although these habits cannot guarantee protection from fatty liver disease.
People should not assume they have low testosterone or start hormone-related treatments based on this research. Anyone concerned about liver health or hormone levels should seek advice from a qualified healthcare professional.
