Alcohol & Nicotine

1. Alcohol & Nicotinepreliminary · human dataAdded 4 October 2026

   One in ten heart deaths in middle-aged men 'prevented' by alcohol, on paper only

   A Finnish modelling study estimated that light to moderate drinking 'prevents' around 400 coronary heart disease deaths a year among men aged 30 to 69, about 12 to 14% of observed deaths, while only around 20 are 'caused' by drinking above the estimated optimum. The figures rest on associations between drinking and heart disease, not on trials of alcohol itself.

   ⚠What it shows: Treat these counts as a what-if, not a measurement: the underlying link between moderate drinking and fewer heart deaths comes from studies that followed people rather than testing on them, so healthier habits among moderate drinkers could explain it. The death tallies were modelled from Finnish survey data on 4,818 people, and the authors themselves put 'prevented' in quote marks.Meta-analysis · J Stud Alcohol

   Full breakdown →All-cause mortality explained →Heart Age Calculator →Estimated numbers of deaths from coronary heart disease "caused" and "prevented" by alcohol: an example from Finland. J Stud Alcohol 1997
2. Alcohol & Nicotinepreliminary · human dataAdded 29 September 2026

   One workout may blunt the urge to drink

   Across six studies of adults aged 18 to 29 with problematic alcohol use, a single bout of exercise was associated with a moderate short-term reduction in alcohol craving, often alongside less anxiety and negative mood.

   ⚠What it shows: Promising but thin: only six studies qualified, they disagreed with each other moderately, and the authors themselves say sturdier, more clinically focused research is needed before this counts as anything like treatment.Meta-analysis · Eur J Sport Sci

   Full breakdown →Acute Effects of Brief Exercise on Alcohol Craving Among Young Adults With Problematic Alcohol Use: A Systematic Review. Eur J Sport Sci 2026
3. Alcohol & Nicotinepreliminary · human dataAdded 28 September 2026

   Alcohol unlikely to cause prostate cancer, but may shape how it progresses

   Genetic evidence from 23,868 men with prostate cancer and 23,051 controls suggests alcohol is unlikely to affect whether men develop the disease. Variants in alcohol-metabolising genes were, however, linked to prostate cancer mortality, hinting that drinking may influence how the disease progresses.

   ⚠What it shows: Indirect but hard to confound: instead of asking men what they drink, it used inherited gene variants that change how the body handles alcohol, pooling results from 25 studies of 23,868 men with prostate cancer and 23,051 without. The progression signal rests on a handful of variants, so it needs confirming before anyone treats it as settled.Meta-analysis · Int J Cancer

   Full breakdown →Healthy Lifestyle & Life Expectancy →Alcohol consumption and prostate cancer incidence and progression: A Mendelian randomisation study. Int J Cancer 2017
4. Alcohol & Nicotinewell supported · human dataAdded 24 September 2026

   Two drinks is enough to disrupt REM sleep; five just makes it worse

   Even a low dose of alcohol, roughly two standard drinks, delays and reduces REM sleep, and the disruption worsens as the dose rises, according to a meta-analysis of 27 studies in healthy adults. High doses, around five standard drinks, may shorten the time it takes to fall asleep, but this likely deepens the REM disruption that follows.

   ⚠What it shows: Solid as sleep evidence goes: results pooled from 27 studies of healthy adults agree that REM sleep suffers after drinking, and that the damage grows with the dose. The picture on total sleep time and night-time waking stayed too uncertain to call either way.Meta-analysis · Sleep Med Rev

   Full breakdown →REM sleep explained →Sleep Calculator →The effect of alcohol on subsequent sleep in healthy adults: A systematic review and meta-analysis. Sleep Med Rev 2025
5. Alcohol & Nicotinewell supported · human dataAdded 21 September 2026

   Therapy apps help people cut drinking, but they never beat a human therapist

   Pooled results from 65 randomised trials found that digitally delivered cognitive behavioural programmes modestly reduced alcohol and drug consumption and improved some psychosocial outcomes compared with minimal treatment, and cut consumption when added to usual care. They were no more effective than therapist-delivered therapy or other active interventions.

   ⚠What it shows: Solid but modest: results pooled from 65 trials in adults using alcohol or other drugs, and the average benefit was small, with the studies often disagreeing with each other. The apps matched, rather than beat, therapy delivered by a human.Meta-analysis · JMIR Ment Health

   Full breakdown →Digitally Delivered Cognitive Behavioral Interventions for Alcohol and Other Drug Use: Meta-Analysis Across Consumption and Psychosocial Outcomes. JMIR Ment Health 2026
6. Alcohol & Nicotinewell supported · human dataAdded 17 September 2026

   Alcohol dents working memory, worst on tasks that juggle information

   Pooled data from 32 studies of 1629 healthy adults show that acute doses of alcohol produce small to medium impairments in working memory, with the deficits most pronounced on tasks requiring active mental manipulation. The size of the effect varied with dose, task type, the control condition used and the sex mix of the sample.

   ⚠What it shows: About as solid as lab evidence gets: results pooled from 32 studies covering 1629 healthy adults, and the average study quality was good. These were one-off measured doses in controlled settings, so real-world drinking situations may play out differently.Meta-analysis · Psychopharmacology (Berl)

   Full breakdown →Executive function explained →Effects of acute alcohol administration on working memory: a systematic review and meta-analysis. Psychopharmacology (Berl) 2022
7. Alcohol & Nicotinewell supported · human dataAdded 10 September 2026

   A daily drink nudges men's blood pressure risk up, and women get no protection either

   Pooled data from 31 cohort studies covering 414,477 people found that men consuming around 10 g of alcohol a day, roughly one small drink, had a 14% higher risk of developing hypertension, while women at the same intake showed no raised risk and no protective effect. Risk climbed in a straight line with intake in white, black and Asian groups, with black people showing the steepest rise per 10 g of daily alcohol.

   ⚠What it shows: About as solid as this question gets without a trial: results pooled from 31 studies that followed 414,477 people rather than testing drinking on them, so other habits that travel with alcohol could still explain part of the link. The sex and race comparisons rely on fewer studies each, which makes those specific numbers less certain than the overall pattern.Meta-analysis · Nutr Metab Cardiovasc Dis

   Full breakdown →Blood pressure explained →Heart Age Calculator →Race- and sex-specific association between alcohol consumption and hypertension in 22 cohort studies: A systematic review and meta-analysis. Nutr Metab Cardiovasc Dis 2020
8. Alcohol & Nicotinewell supported · human dataAdded 27 August 2026

   Cutting alcohol lowers blood pressure, and heavy drinkers see the biggest drop

   Reducing alcohol intake lowered systolic blood pressure by 3.31 mm Hg and diastolic by 2.04 mm Hg in a meta-analysis of 15 randomised trials with 2234 participants. The more people cut their drinking, the bigger the drop, and effects were larger in those starting with higher blood pressure.

   ⚠What it shows: About as solid as lifestyle evidence gets: results pooled from 15 trials in 2234 people where cutting alcohol was the only difference between groups. The biggest drops came in heavier drinkers with higher starting pressure, so light drinkers with normal readings have less to gain.Meta-analysis · Hypertension

   Full breakdown →Blood pressure explained →Heart Age Calculator →Effects of alcohol reduction on blood pressure: a meta-analysis of randomized controlled trials. Hypertension 2001
9. Alcohol & Nicotinepreliminary · human dataAdded 26 August 2026

   Resilience barely dents drinking, and only some kinds help

   In 66 studies of resilience and drinking, with 24 of them pooled, higher personal resilience was associated with only slightly lower odds of alcohol-related outcomes (pooled odds ratio 0.91), and the studies disagreed with each other enormously. Emotion-regulation and coping components of resilience showed more consistent protective associations than competence or achievement-oriented traits.

   ⚠What it shows: Weak evidence for a popular idea: results pooled from 24 studies that surveyed or followed people rather than testing anything on them, so it cannot show that becoming more resilient makes anyone drink less. The studies also disagreed with each other almost completely, and two-fifths were done in school or college students, mostly in high-income countries.Review · Clin Psychol Rev

   Full breakdown →The effect of resilience on alcohol use and alcohol-related outcomes: A systematic review and meta-analysis. Clin Psychol Rev 2026
10. Alcohol & Nicotinewell supported · human dataAdded 12 August 2026

    Drinking's mental fog can take a year of sobriety to lift

    In a meta-analysis of 62 studies, people with alcohol abuse or dependence showed moderate impairment across 11 of 12 cognitive domains in the first month of abstinence, deficits that persisted through the first year of sobriety and generally abated after 1 year.

    ⚠What it shows: Reassuring on recovery, but it compared different groups of people at different stages of sobriety rather than following the same individuals over time. It pools 62 studies of people with alcohol abuse or dependence, so it says little about moderate drinkers.Meta-analysis · Addict Biol

    Full breakdown →Executive function explained →Widespread and sustained cognitive deficits in alcoholism: a meta-analysis. Addict Biol 2013
11. Alcohol & Nicotinepreliminary · human dataAdded 8 August 2026

    Drinkers outlived abstainers over 30 years, with a beer-shaped catch

    In a 30-year prospective cohort of 973 middle-aged Swedish men, alcohol consumers had lower odds of myocardial infarction (OR 0.57) and a median survival advantage of 1.3 years over non-consumers, yet beer specifically was linked to higher odds of heart attack (OR 1.70), and no association with stroke was found.

    ⚠What it shows: Observational cohort of 973 male Swedish automotive workers followed for 30 years; associations only, cannot establish causation, and findings may not generalise to women or other populations.Study · Scand J Prim Health Care

    Full breakdown →All-cause mortality explained →Healthy Lifestyle & Life Expectancy →Link between alcohol consumption and myocardial infarction, stroke, and all-cause mortality among Swedish male automotive workers over 30 years. Scand J Prim Health Care 2026
12. Alcohol & Nicotinepreliminary · human dataAdded 6 August 2026

    Alcohol's stroke risk climbs steeply past light drinking

    Across 17 prospective cohorts of East Asian men, light drinking (up to 20 g/day) was associated with a lower risk of ischaemic stroke (RR 0.85) and lower all-cause mortality (RR 0.83), while intake above 60 g/day was associated with markedly higher haemorrhagic stroke (RR 1.74) and death from any cause (RR 1.32). The relationship was dose-dependent, with risk rising as intake climbed.

    ⚠What it shows: Meta-analysis of 17 prospective cohort studies, but entirely observational and restricted to East Asian men (cohorts ranged from 1322 to 108,461 subjects); data on women were too limited to include. Associations cannot establish cause, and residual confounding can flatter apparent benefits at low intakes.Meta-analysis · Zhonghua Yi Xue Za Zhi

    Full breakdown →All-cause mortality explained →Healthy Lifestyle & Life Expectancy →[Alcohol intake and stroke in Eastern Asian men:a systemic review and meta-analysis of 17 prospective cohort studies]. Zhonghua Yi Xue Za Zhi 2010

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