Podcast episode 77 (in German)
Alcohol: the pleasurable poison fact-checked
September 15, 2026
We measure our sleep, optimize our mitochondria, count grams of protein — and on Friday evening two glasses are on the table. This solo episode looks, without moralizing and without whitewashing, at what the data on alcohol now show.
What it is about
For decades, observational studies showed a J-shaped curve: moderate drinkers seemed to live longer than abstainers. The episode shows where the catch in this curve lies, what Mendelian randomization made of it and why the major institutions rewrote their recommendations. Then it goes into the body — acetaldehyde, cancer, sleep, muscle building, hormones — and after that to the good news, which is surprisingly strong: how quickly measurable values improve when you give the body a break. Finally there is a toolkit for everyone who wants to drink less without imposing an ascetic dogma on themselves.
Key points
- The group of abstainers contains many sick quitters; if moderate drinkers are compared only with lifelong non-drinkers, the supposed protective effect shrinks dramatically.
- Mendelian randomization studies in hundreds of thousands of people in China and Europe found no protective effect of moderate drinking — the risk rises fairly steadily with the amount.
- The World Health Organization wrote in 2023 that there is no safe amount; Canada cites at most 2 standard drinks per week, and the German Nutrition Society has said since 2024 that zero is best.
- Acetaldehyde is in the highest carcinogen category, the same as tobacco smoke and asbestos, and 7 types of cancer are causally linked to alcohol.
- 1 to 2 glasses in the evening make nightly heart rate variability collapse, raise the resting heart rate by 5 to 10 beats and cut REM sleep.
- An Australian study found muscle protein synthesis after exercise inhibited by a good fifth, even when protein was eaten at the same time.
- Blood pressure, sleep architecture and heart rate variability often improve after just 2 to 4 weeks without — as documented by the evaluations of alcohol-free January campaigns.
Where the data stop
The risk curve rises with the amount, but it starts flat. One glass a week moves the absolute lifetime risk only minimally, and the Canadian guidelines call up to 2 drinks per week a low risk. The individual overall picture counts: someone who is lean, trains, sleeps well and consciously has a glass twice a month has a different risk profile from the daily after-work drinker. Science does not say that one sip ruins everything — it says that there is no health reason to drink and that every reduction counts.
The numbers from wearables are also everyday data, not controlled studies. Anyone taking medication or supplements should do the interaction check with a doctor or pharmacy; it takes 5 minutes. And anyone who notices that stopping is hard, drinks secretly or thinks about drinking in the morning will find confidential support from their GP, addiction counselling services and anonymous groups.
Listen (in German)
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Published on September 15, 2026.
The topic in the database
- Not an active substance but a lever of leaving something out: less alcohol measurably improves sleep, HRV and recovery – and lowers cancer risk.Cutting down on alcohol
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Information only, not medical advice and not a usage or dosage recommendation. Prescription-only and unapproved substances belong in the hands of a physician. Last updated: 2026-10-09.