Time restricted eating involves getting most or all of your calories within a more-compressed-than-usual time window, say six to 12 hours (the fewer hours the better) rather than noshing for most of the time you’re awake. (But by all means, drink calorie-free liquids to stay hydrated during ‘fasting’ hours.) TRE also stresses eating your last meal as early as you can practically manage — for example, breakfast at 11 a.m., possible snack at 3 p.m., if necessary, and dinner at 7 p.m. would give you an eating window of eight hours — a TRE starter course!