Set a time-restricted eating window

Confine all your eating to a consistent daily window (e.g. 10–12 hours) and fast the rest.

Why it works

A fixed window works mainly as a behavioral constraint: by closing the kitchen at a set time you remove the highest-risk eating occasions (late-night, mindless grazing), which tends to cut total intake without counting anything. A consistent window may also align eating with your daytime circadian metabolism, when the body handles glucose better, though that effect is smaller and less certain than the simple "you ate less" effect.

How to do it

1. Pick a window you can keep daily — start gentle, like 12 hours (8am–8pm).
2. Anchor the window to fixed cues: first coffee opens it, brushing teeth closes it.
3. Drink water, tea, or black coffee during the fast so hunger isn’t mistaken for thirst.
4. Hold the window stable for two weeks before judging it — early hunger usually settles.

Evidence

Trials show time-restricted eating can produce modest weight loss and metabolic improvements, but when calories are matched the advantage over standard dieting largely disappears — pointing to calorie reduction as the main active ingredient. (rct)

Benefits in most studies track the calorie reduction the window causes, not fasting itself. Skipping breakfast specifically has shown mixed results.

Sources

• Lowe et al. (2020), TREAT randomized trial, JAMA Internal Medicine (no significant weight advantage of time-restricted eating over standard meals)

Common mistake

Treating the window as a license to overeat inside it — packing the same or more calories into fewer hours, which erases the only reliable mechanism.