This research reveals that the types of fungi living in our gut are linked to fatty liver disease in ways we didn’t fully understand before. While researchers have long studied bacteria in our gut, they largely ignored fungi, which turns out to play an important role too. The study found that certain fungal species are more common in people with fatty liver disease, and these fungi influence the metabolites (chemical compounds) in the blood that affect liver health. By combining information about fungi, bacteria, and blood chemistry, scientists developed a test that could identify fatty liver disease with 77% accuracy, suggesting that looking at gut fungi could help doctors diagnose and treat this common liver condition.