Eating after 8 PM makes you gain weight

The myth

Eating in the evening — especially after 8 or 9 PM — automatically leads to weight gain because your body 'stores' calories as fat overnight.

What the evidence says

Weight change is driven by total daily energy balance, not by the clock. What does correlate with late-night eating in observational studies is *more total calories* and *lower diet quality* — late-night snacking is usually unplanned, often hyperpalatable food. Strict time-restricted eating (e.g. eating only within 8 hours per day) shows modest weight loss in some trials, but mostly because it reduces total intake — not because of magical 'after-X-PM' biology.

What to do instead

Don't obsess over a cutoff time. If late-night eating is where extra unplanned calories sneak in (most common), structure dinner so you finish satisfied. If your schedule means dinner at 10 PM, that's fine — eat the meal you'd eat anyway. Sleep quality matters more than meal timing within a 1-2 hour window.

Schoenfeld et al., How nutrient timing relates to performance (Curr Opin Clin Nutr, 2018)