Nobody here is going to tell you to give up wine. But alcohol and an eating window interact in a couple of ways worth knowing, and most of them land the next day.
Why does a drink lead to eating more?
Pooling twenty-two trials, drinking alcohol made people eat more than a non-alcoholic drink did, with little sign they ate less later to balance it.3
There’s a reason beyond appetite. In a study of sixty women given alcohol or a placebo, alcohol worsened their performance on a test of impulse control, and that change accounted for how much more they snacked.
Young women in a single lab session, so take the mechanism rather than the size of it.4
On an empty stomach at the end of a long fast, that effect has a lot of room to work.
What does it do to sleep?
More than most people credit. A review of twenty-seven studies in healthy adults found alcohol delayed and shortened REM sleep, and the disruption showed up even at a couple of drinks.1
In an overnight study with sleep monitoring in ninety-three young adults, alcohol made people fall asleep faster but cut REM and increased waking later on. The disruption was greater in the women than the men.2
The drink that helps you drop off is the same drink that wakes you at three.
And poor sleep makes the next day’s fast noticeably harder. Which is how one evening turns into a difficult two days.
How do you make it work?
- Inside your window, with food. Not before it.
- A couple of hours before bed if you can manage it.
- Water between drinks. Does more for tomorrow than anything else here.
- Plan a gentle morning. A shorter fast after a night out is an adjustment, not a failure.
Is alcohol a hot flash trigger?
The evidence is weaker than the advice. In a study of over seven hundred women in the menopause transition, women who drank more actually reported fewer hot flashes.5
That doesn’t make alcohol a treatment, and the study can’t show cause either way. It does mean you don’t need to give up a glass of wine on the strength of a list somebody posted.