The Fasting Clock That Failed to Clear Fatty Liver

Key Takeaway

In a 12-week randomized trial involving 187 adults with obesity, an 8-hour time-restricted eating window, supervised exercise, or their combination failed to outperform Mediterranean diet and physical activity education in reducing MRI-measured hepatic steatosis. When managing fatty liver disease, the clock on the kitchen wall matters far less than what is on the plate.

The Patient Who Stopped Eating After 6:00 PM

He walks into the clinic holding a printout and carrying a quiet sense of pride. Inspired by a podcast that promised to “detoxify” his liver, he has consumed all his meals exclusively between 10:00 AM and 6:00 PM for the past three months. Yet his body mass index remains stubbornly above 30 kg/m², and his latest ultrasound reveals a bright, diffusely echogenic liver characteristic of marked steatosis. He wants to know whether this eating window is actually working, and whether tacking on a gym membership might accelerate his progress. Clinicians encounter variations of this query every week. Marketed as a metabolic reset far superior to conventional dietary guidance, intermittent fasting has evolved into an ingrained cultural reflex. The TEMPUS trial put that premise directly before an MRI scanner—and the…