Time-restricted eating compresses the day's food into a fixed window — commonly 8–10 hours — and fasts the rest, making it the daily form of intermittent fasting.
The 2019 review by de Cabo and Mattson in the New England Journal of Medicine reports that restricted eating windows trigger a "metabolic switch" toward ketone-based energy, and summarises human trials showing improvements in insulin sensitivity, blood pressure and markers of inflammation in short- to medium-term studies — while noting that trials are mostly small and short, and that people on diabetes medication need medical supervision before fasting. A fuller neutral summary, with the same references, sits in this Discovery section under Intermittent Fasting on the Food Diets page.