Sober October: a practical guide, with the evidence
Thirty-one days without alcohol. How to set the rules, what to plan for, and what a month off has actually been shown to do.
Sober October is a 31-day alcohol-free challenge; in the UK it runs as Macmillan Cancer Support’s Go Sober for October fundraiser [1]. In a BMJ Open study, 94 people who abstained for a month saw significant falls in insulin resistance, blood pressure, weight and two cancer-related growth factors, though it was observational [2]. If you drink heavily, speak to a doctor before stopping suddenly [3].
What Sober October is
Sober October is a 31-day alcohol-free challenge. In the UK it is run by Macmillan Cancer Support as Go Sober for October, a fundraiser that began in 2013, and the money goes to Macmillan’s nurses, helplines and home visits [1]. Many people also do it on their own, with no fundraising, as a one-month reset.
If you are reading this partway through the month, you do not need to wait for next October. Day one is whenever you start, and you can count 31 days from there.
Track it in Sober Girl
Check this before you start
Pick your rules before day one
Challenges fail on vague rules. Decide these in advance and write them down:
- Full month or the rest of the month. Decide whether you are doing all 31 days or 31 days from today.
- What counts. Be explicit about low-alcohol and alcohol-free drinks. Some people want them, others find they keep the habit alive.
- What a slip means. Decide now. The most useful rule is that a slip is information about what to plan for, not a verdict. Log it, note the trigger, and carry on.
- Who knows. Tell one person who will ask how it is going.
Plan for the days that are hard
This is general advice rather than research. Look at the October calendar and mark the dates that carry a drink with them: weddings, work events, Halloween parties, a weekend away. For each one, decide what you will order, who you will tell and when you will leave. A script for the first offer of a drink makes the moment smaller.
Keep a craving plan on your phone. Decide what you will do in the moment, so you are not improvising. Sober Girl’s Craving SOS combines a breathing exercise, a 10-minute timer and the reason you wrote for yourself.
What a month off has been shown to do
A BMJ Open study followed 94 healthy people who chose to stop drinking for a month, with 47 who kept drinking for comparison. After the month, insulin resistance, systolic and diastolic blood pressure, weight and two cancer-related growth factors had all fallen significantly [2]. It was observational, the groups chose themselves and it excluded people with liver disease or alcohol dependence [2].
What changed after one month without alcohol
Reduction from baseline in people who abstained for a month (n = 94). Bars show the size of the fall.
On what participants report, Alcohol Change UK summarises Dry January evaluations in which 70% said they slept better and 86% said they saved money [5]. That is January rather than October, and people who sign up for challenges are not a random sample, but the experience of a month off is the same kind of thing.
What happens in November
Alcohol Change UK reports that six months after Dry January, seven out of ten participants were still drinking less riskily than before [6]. We do not have equivalent figures for October. The practical point is the same, though: decide before day 31 what you will do on day 32, whether that is another month, a set number of drinking days or staying off.
Is Sober Girl right for you?
- use an Android phone (the iPhone app is coming soon)
- want a private tracker, with your journal kept on your device
- want a day counter, money saved and a daily check-in in one calm place
- want a Craving SOS with a breathing exercise and a 10-minute timer
- want to start free and add Plus only if you need the journal, insights or milestone cards
- need it on an iPhone today (the App Store version is coming soon)
- want a community feed, live coaching or an AI chat
- want a structured multi-week education program
- need medical help for heavy drinking or withdrawal. An app is not treatment, so see the safety notes above
Frequently asked questions
Is Sober October the same as Dry January?
They are the same idea in different months. Dry January is run by Alcohol Change UK, and Go Sober for October by Macmillan Cancer Support as a fundraiser. Both ask you to go a month without alcohol.
Can I start Sober October late?
Yes. Nothing makes the first of the month special. You can count 31 days from the day you start.
What if I slip?
Log it, note what led to it and carry on. A slip does not erase the days you already did. If you find you cannot stop once you start, or stopping makes you feel unwell, speak to a doctor.
Is it safe to stop drinking for a month?
For many people yes, but if you drink heavily or daily, withdrawal can be dangerous. Speak to a doctor before you stop.
Sources
- Go Sober for October. Awareness Days, describing the Macmillan Cancer Support campaign.
- Short-term abstinence from alcohol and changes in cardiovascular risk factors, liver function tests and cancer-related growth factors: a prospective observational study. Mehta G, Macdonald S, Cronberg A, et al. BMJ Open 2018;8:e020673. Observational study. 94 people who chose to abstain for a month and 47 who kept drinking.
- Alcohol withdrawal. MedlinePlus (US National Library of Medicine), reviewed 1 January 2025 by Frank D. Brodkey, MD.
- National Helpline. SAMHSA. Free, confidential, 24/7 treatment referral line: 1-800-662-4357.
- The evidence behind the Dry January challenge: benefits and long-term impact. Alcohol Change UK, summarising evaluations by Dr Richard de Visser, University of Sussex. Self-reported results from people who signed up to Dry January, not a controlled trial.
- About Dry January. Alcohol Change UK.
How we write these. Every figure above links to the source it came from, and we label self-reported and observational results as such. Where we could not find a source we trust, the page says so instead of filling the gap. Sober Girl is made by ShipAI Lab and this is not medical advice. Sources were checked on 6 October 2026. If you spot an error, email us at integrateopenai@gmail.com.
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Today is day one.
Sober Girl is a private sobriety tracker for women, on Android now and coming soon to iPhone: day counter, money saved, craving SOS and a tree that grows with you. Free to start.