Brain
22%of the documented window
Measured by day 3
Withdrawal symptoms peak at 24 to 72 hours after the last drink and can go on for weeks (StatPearls 2024; MedlinePlus).
Next measured change
By the second week, state anxiety scores were back in the normal range in abstinent men (Brown, Irwin & Schuckit 1991), and grey-matter volume had partly recovered in several regions after 14 days (van Eijk 2013).
Day 14 · October 18, 2026
The cohorts were dependent, treatment-seeking and mostly men. This window does not transfer to a moderate drinker cutting back.
Who was measured: dependent, treatment-seeking drinkers, mostly men.
Sources
- Alcohol Withdrawal Syndrome — StatPearls, NCBI Bookshelf (Canver, Newman, Gomez; Feb 2024)
- Alcohol withdrawal — MedlinePlus, US National Library of Medicine
- Changes in anxiety among abstinent male alcoholics — Journal of Studies on Alcohol, 1991 (PubMed)
- Rapid partial regeneration of brain volume during the first 14 days of abstinence from alcohol — Alcoholism: Clinical and Experimental Research, 2013 (PubMed)
- Alcohol's Effects on Brain and Behavior — Alcohol Research & Health, 2010 (NIAAA journal, PMC)
- Alcohol's Effects on the Brain: Neuroimaging Results in Humans and Animal Models — Alcohol Research: Current Reviews, 2017 (NIAAA journal, PMC)
- Regional Brain Volume Changes in Alcohol-Dependent Individuals During Short-Term and Long-Term Abstinence — Alcoholism: Clinical and Experimental Research, 2018 (PMC)
Heart and circulation
35%of the documented window
Measured by day 3
Nocturnal resting heart rate, raised while drinking, settles back within about three days of stopping (Strüven 2025).
Next measured change
Systolic blood pressure fell 6.6% after one month without alcohol in heavy drinkers, in a non-randomised study (Mehta 2018).
Day 30 · November 3, 2026
You said a few a week: the blood-pressure change in this window is not expected at two drinks a day or fewer (Roerecke 2017).
The blood-pressure findings come from heavy drinkers.
Who was measured: heavy drinkers.
Sources
Liver
18%of the documented window
Measured by day 7
Nothing measured before day 14, the first point in this window.
Next measured change
Carbohydrate-deficient transferrin, a marker of heavy drinking, falls with a half-life of 14 ± 3 days once drinking stops (Stibler, Dahlgren & Borg 1988).
Day 14 · October 18, 2026
These are blood markers, not liver tissue. Whether the tissue recovers depends on how far any damage had gone — that is a doctor's measurement, not a date's.
Who was measured: heavy drinkers.
Sources
Gut
37%of the documented window
Measured by day 7
Nothing measured before day 19, the first point in this window.
Next measured change
After 19 days without alcohol, gut permeability in the dependent drinkers who had raised it came down to the control group's level; the gut bacteria were still disturbed (Leclercq 2014).
Day 19 · October 23, 2026
Nothing about the gut has been measured beyond three weeks after quitting, so the window closes there. Nothing here says the gut bacteria have recovered.
Who was measured: dependent, treatment-seeking drinkers, mostly men.
Sources
Kidneys and fluid balance
100%of the documented window
Measured by day 1
Alcohol's effect on urine output is transient and does not cause appreciable fluid loss, so fluid balance returns within the first day (US Institute of Medicine 2005, via Polhuis 2017).
Window complete
The last measured point in this window is day 1. Nothing later has been measured.
Nothing about the kidneys is measured after the first day, so this window is one day long.
Who was measured: mixed cohorts.
Sources
Skin
Skin — no measured timeline
No study at any interval measures skin after a person stops drinking. The NHS lists better-looking skin as a benefit of drinking less, without a timeframe. The outline is drawn dotted and never scored.
Sources