Fix the window. Not your willpower.

Less than the marketing suggests. In controlled trials where total intake is matched, time-restricted eating produces broadly similar results to ordinary continuous restriction — there's no special state that makes the same food behave differently. Its real advantage is adherence: some people find one clear rule far easier than counting, and for them it genuinely works. That's a real benefit, stated honestly. The autophagy claims circulating online come largely from animal work, and the specific hour thresholds aren't well established in humans.

Almost certainly one of four things, and none of them is weak willpower. The window conflicts with meals you can't move. You're under-eating inside it, which produces an evening episode that looks like failed discipline and is actually physiology. The rule has made eating a moral event, so guilt produces the next episode. Or it's simply the wrong tool for you — which is a legitimate finding rather than a failure.

Usually the opposite. A twelve or fourteen hour window you keep for six months does far more than an eight hour one you keep for nine days. If your current window is causing repeated failure, widen it rather than persisting — and use different windows on weekdays and weekends, which isn't cheating. Decide your exceptions in advance too: if birthdays and dinners out are outside the schedule by design, there's nothing to break.

Because a broken streak turns an ordinary day into a failure event, and for this particular pattern that's the exact mechanism that produces the next one. You log three numbers with no scoring: your window, whether you ate enough in it, and your energy. The middle column is the one worth watching — it predicts how the evening goes better than the window length does.

It's a longer list than most content admits, and it's the first thing checked. Fasting needs medical supervision or is unsuitable with type 1 diabetes, insulin or other medicines that can lower blood sugar, in pregnancy and breastfeeding, under eighteen, if you're underweight, and with any history of an eating disorder — where a fasting window can legitimise restriction and the pattern is contraindicated. Feeling faint or shaky while fasted is a signal to widen the window, not a stage to push through.