A claim you hear on longevity podcasts

Does even light drinking raise your cancer risk?

The claim checked: Even light drinking can raise cancer risk, and there's no evidence red wine lowers heart disease risk Hear it at 8:31

What do the studies say?

Strong consensus for

Six of ten studies found that even light drinking, about one drink a day or less, raised the risk of some cancers, such as mouth, throat, esophagus and breast. Four found no clear rise in cancer overall.

Computed from 10 studies that test this point, each judged by two readers, in full. 2 more studies are waiting for a full read and do not count yet.

What was said on the podcast?

“Cancer risk generally increases with greater consumption. Even light drinking though can increase the risk of cancer.”
Mark Hyman, The Dr. Hyman Show · 5 Things You Think Are Extending Your Life (That Are Actually Doing Nothing) · 8:31 on YouTube
Episode check Fasting can cost you muscle, the episode says. In six of ten studies, it didn't. 5 claims checked against 79 studies · 1 chapter not checked yet See the whole episode →
Point 1 of 2 Strong consensus for

Even light drinking increases the risk of cancer

Agree 6

pooled analysis · 2018 · landmark

“For all other outcomes, including all cancers, we found that relative risk monotonically increased with alcohol consumption ( appendix 2, pp 57–146 ).”

Alcohol use and burden for 195 countries and territories, 1990-2016: a systematic analysis for the Global Burden of Disease Study 2016. Lancet
Who: Populations of 195 countries and territories, 1990-2016 (GBD 2016), with relative risks from a systematic review of observational studies of alcohol and 23 health outcomes
PMID 30146330

pooled analysis · 2015 · landmark

“In the present study, alcohol drinking was associated with cancer of the oral cavity and pharynx, oesophagus (SCC) and female breast even at low doses.”

Alcohol consumption and site-specific cancer risk: a comprehensive dose-response meta-analysis. Br J Cancer
Who: Case-control and cohort studies of alcohol and solid cancers, published 1956-2012, in North America, Europe, Asia and elsewhere
PMID 25422909

other primary study · 2021 · landmark

“Risky and heavy drinking contributed most to the burden of alcohol-attributable cancers; however, moderate drinking still contributed one in seven alcohol-attributable cases and more than 100 000 cancer cases worldwide.”

Global burden of cancer in 2020 attributable to alcohol consumption: a population-based study. Lancet Oncol
Who: Global population in 2020: country-level cancer incidence from GLOBOCAN 2020 and 2010 alcohol consumption from the Global Information System on Alcohol and Health, grouped into 17 world regions
PMID 34270924

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pooled analysis · 2013 · landmark

“In conclusion, alcohol increases the risk of cancer of the oral cavity and pharynx, SCC of the esophagus and breast even at low doses.”

Light alcohol drinking and cancer: a meta-analysis. Ann Oncol
Who: Case-control and cohort studies comparing light drinkers (≤12.5 g ethanol, ≤1 drink/day) with non-drinkers for cancers of the oral cavity and pharynx, esophagus (SCC), colorectum, liver, larynx and female breast
PMID 22910838

pooled analysis · 2023 · landmark

“Our findings showed that even light alcohol consumption, defined as less than 1 drink, was associated with increased risks of esophageal, colorectal, prostate (in male), and breast (in female) cancers.”

Cancer risk based on alcohol consumption levels: a comprehensive systematic review and meta-analysis. Epidemiol Health
Who: Cohort studies (Americas, Asia, Europe/Australia) of drinkers vs non-drinkers or occasional drinkers for esophageal, stomach, liver, pancreatic, colorectal, laryngeal, lung, thyroid, breast and prostate cancer, plus the Pooled Korean Biobank
PMID 37905315

other primary study · 2016

“For these organ sites, risk estimates of alcohol-related cancer incidence and mortality emphasize a dose-dependent relationship that does not vary by beverage type and does not show a threshold of intake, with an adverse effect observed even at consumption of less than 1 alcoholic drink per day [12,72].”

European Code against Cancer 4th Edition: Alcohol drinking and cancer. Cancer Epidemiol
Who: Evidence review for the general European population, drawing on IARC Monographs, cohort studies and meta-analyses of alcohol and cancer
PMID 27816465

Partly agree 4

other primary study · 2020 · landmark

“We found no evidence in support of a relationship between alcohol consumption and overall cancer risk, but associations between alcohol consumption and risk of site-specific cancer should be further investigated.”

Smoking, alcohol consumption, and cancer: A mendelian randomisation study in UK Biobank and international genetic consortia participants. PLoS Med
Who: Adults of European descent: UK Biobank (aged 37-73 at baseline) plus international lung, breast, ovarian and prostate cancer GWAS consortia
PMID 32701947

other primary study · 2015

“Overall, light to moderate drinking (alcohol intake of <15 g/day for women and <30 g/day for men) was associated with a small but non-significant increase in cancer risk in both women and men.”

Light to moderate intake of alcohol, drinking patterns, and risk of cancer: results from two prospective US cohort studies. BMJ
Who: US female nurses (Nurses' Health Study) and male health professionals (Health Professionals Follow-up Study), free of cancer at baseline
PMID 26286216

pooled analysis · 2001

“For all these types of cancer, significant increases in risk existed even at the lowest consumption level studied here (i.e., 25 grams of alcohol, or two standard drinks per day).”

Alcohol consumption and the risk of cancer: a meta-analysis. Alcohol Res Health
Who: Case-control and cohort studies of alcohol intake and cancer at 19 sites, published 1966-2000
PMID 11910703

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pooled analysis · 2018

“Our meta-analysis of cohort studies found that compared with non or occasional alcohol drinking, very light or light drinking was not associated with the risk of most cancers except for female breast cancer and male colorectal cancer with a small increase in incidence.”

Light Alcohol Drinking and Risk of Cancer: A Meta-Analysis of Cohort Studies. Cancer Res Treat
Who: General healthy populations in prospective or retrospective cohort studies; light drinking (≤1 drink/day) and very light drinking (≤0.5 drink/day) vs non or occasional drinkers
PMID 28546524

Disagree 0

None.

Point 2 of 2 Conflicting

Red wine does not reduce the risk of heart disease

Four studies that used genes as a natural experiment found no heart benefit from drinking. Five found lower heart disease risk in light-to-moderate drinkers, mostly from observational data, and one was mixed. Only one measured wine itself.

Computed from 10 studies that test this point, each judged by two readers, in full. Sources land on both sides. 9 more studies are waiting for a full read and do not count yet.

Agree 4

pooled analysis · 2014 · landmark

“Our results therefore challenge the concept of a cardioprotective effect associated with light to moderate alcohol consumption reported in observational studies and suggest that this effect may have been due to residual confounding or selection bias.”

Association between alcohol and cardiovascular disease: Mendelian randomisation analysis based on individual participant data. BMJ
Who: Adults of European ancestry from 56 population-based studies, analysed with the ADH1B rs1229984 variant as a genetic proxy for alcohol intake (Mendelian randomisation)
PMID 25011450

other primary study · 2019 · landmark

“For acute myocardial infarction, they suggest little net effect on risk over the range from near zero to about 250 g per week of predicted mean intake.”

Conventional and genetic evidence on alcohol and vascular disease aetiology: a prospective study of 500 000 men and women in China. Lancet
Who: Chinese adults aged 30-79 (mostly 35-74) from ten urban and rural areas, China Kadoorie Biobank; genetic analyses informative in men because few women drink
PMID 30955975

trial or observed group · 2022 · landmark

“First, the reported cardioprotective effects of light to moderate alcohol consumption may be the product of confounding lifestyle factors.”

Association of Habitual Alcohol Intake With Risk of Cardiovascular Disease. JAMA Netw Open
Who: Unrelated adults of European genetic ancestry in the UK Biobank, with replication in the Mass General Brigham Biobank
PMID 35333364

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trial or observed group · 2020 · landmark

“Importantly, in our main analysis, we failed to find a cardioprotective relationship between alcohol use and CVD outcomes.”

Evaluating the relationship between alcohol consumption, tobacco use, and cardiovascular disease: A multivariable Mendelian randomization study. PLoS Med
Who: Predominantly European-ancestry GWAS participants (alcohol instruments from 941,280 participants in 29 cohorts and 414,343 UK Biobank participants; CAD/MI outcomes from CARDIoGRAMplusC4D, UK Biobank, FinnGen and others)
PMID 33275596

Partly agree 1

trial or observed group · 2020 · landmark

“There was some evidence for positive associations of genetically predicted alcohol consumption with coronary artery disease (OR, 1.16 [95% CI, 1.00–1.36]; P =0.052), atrial fibrillation (OR, 1.17 [95% CI, 1.00–1.37]; P =0.050), and abdominal aortic aneurysm (OR, 2.60 [95% CI, 1.15–5.89]; P =0.022) in the univariable inverse variance–weighted analysis (Figure 3 ; Table X in the Data Supplement ).”

Alcohol Consumption and Cardiovascular Disease: A Mendelian Randomization Study. Circ Genom Precis Med
Who: Mostly European-ancestry adults in genome-wide association consortia (MEGASTROKE, CARDIoGRAMplusC4D, AFGen, ISGC) and UK Biobank, analysed by Mendelian randomization
PMID 32367730

Disagree 5

pooled analysis · 2011 · landmark

“In this review of 84 studies of alcohol consumption and cardiovascular disease, alcohol consumption at 2.5–14.9 g/day (about ≤1 drink a day) was consistently associated with a 14–25% reduction in the risk of all outcomes assessed compared with abstaining from alcohol.”

Association of alcohol consumption with selected cardiovascular disease outcomes: a systematic review and meta-analysis. BMJ
Who: Meta-analysis of prospective cohorts of adults aged 18+ without pre-existing cardiovascular disease, comparing alcohol drinkers with non-drinkers
PMID 21343207

pooled analysis · 1999 · landmark

“On the basis of published associations between these biomarkers and risk of coronary heart disease we calculated an overall predicted 24.7% reduction in risk of coronary heart disease associated with an intake of 30 g of alcohol a day owing to changes in these markers.”

Moderate alcohol intake and lower risk of coronary heart disease: meta-analysis of effects on lipids and haemostatic factors. BMJ
Who: Men and women free of chronic disease and not alcohol dependent, in experimental (feeding) studies published 1965-1998, mostly young healthy populations
PMID 10591709

pooled analysis · 2014 · landmark

“Nevertheless, for drinkers having one to two drinks per drinking day without episodic heavy drinking, there is substantial and consistent evidence from epidemiological and short-term experimental studies for a beneficial association with IHD risk when compared to lifetime abstainers.”

Alcohol consumption, drinking patterns, and ischemic heart disease: a narrative review of meta-analyses and a systematic review and meta-analysis of the impact of heavy drinking occasions on risk for moderate drinkers. BMC Med
Who: Adult (≥18 years) population samples in case-control and cohort studies and prior meta-analyses of alcohol consumption and ischemic heart disease, with lifetime abstainers as reference
PMID 25567363

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trial or observed group · 2017 · landmark

“Compared with moderate drinkers, non-drinkers had an increased risk of developing unstable angina (hazard ratio 1.33, 95% confidence interval 1.21 to 1.45) or experiencing a myocardial infarction (1.32, 1.24 to 1.41), unheralded coronary death (1.56, 1.38 to 1.76), heart failure (1.24, 1.11 to 1.38), ischaemic stroke (1.12, 1.01 to 1.24), peripheral arterial disease (1.22, 1.13 to 1.32), and abdominal aortic aneurysm (1.32, 1.17 to 1.49) as their initial presentation of cardiovascular disease.”

Association between clinically recorded alcohol consumption and initial presentation of 12 cardiovascular diseases: population based cohort study using linked health records. BMJ
Who: Adults free of cardiovascular disease at baseline in UK linked electronic health records (CPRD, HES, MINAP, ONS)
PMID 28331015

controlled trial · 2025 · landmark

“In conclusion, using an objective and reliable urinary biomarker, we found that light-to-moderate consumption of wine was associated with a lower rate of clinical cardiovascular events in a Mediterranean population at high cardiovascular risk.”

Urinary tartaric acid as a biomarker of wine consumption and cardiovascular risk: the PREDIMED trial. Eur Heart J
Who: Older Spanish adults (mean age 68, 657 women and 575 men) at high cardiovascular risk in the PREDIMED trial; case-cohort design
PMID 39689849

What else was said but not tested?

  • Red wine polyphenols can be had from vegetables, berries, herbs, spices, nuts, seeds and teas

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