Alcohol (ethanol)
Toxins · Neurotoxic psychoactive
Critical exposure concern
Bottom line
Read Off Label rates Alcohol (ethanol) a CRITICAL exposure concern (8.5/10) based on very strong evidence of very strong harm magnitude and varies by consumption exposure prevalence.
The J-curve (moderate drinking cardioprotective) has been largely reanalyzed away — recent Mendelian randomization and bias-corrected analyses (Zhao 2023 JAMA Network Open) suggest no benefit at any level.
This entry describes an exposure rather than an added intervention.
What the evidence says
The J-curve (moderate drinking cardioprotective) has been largely reanalyzed away — recent Mendelian randomization and bias-corrected analyses (Zhao 2023 JAMA Network Open) suggest no benefit at any level. Canada 2023 became the first major country to dramatically lower guidance. IARC-classified carcinogen at any dose. Biohacker community largely shifting to near-abstinence.
Mechanism
Ethanol → acetaldehyde (IARC Group 1 carcinogen) → acetate; central nervous system depressant via GABA-A, NMDA antagonism; metabolized by ADH → ALDH2 (common E. Asian deficiency polymorphism)
Reported exposure / mitigation context
Cancer risk rises with alcohol intake and no zero-risk threshold has been established; risk varies with dose and drinking pattern
Citations
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Common questions
- How harmful is Alcohol (ethanol)?
- Alcohol (ethanol) is rated CRITICAL exposure concern (8.5/10) on the Read Off Label scale, derived from very strong evidence of very strong harm magnitude and varies by consumption exposure prevalence.
- How does Alcohol (ethanol) cause harm?
- Ethanol → acetaldehyde (IARC Group 1 carcinogen) → acetate; central nervous system depressant via GABA-A, NMDA antagonism; metabolized by ADH → ALDH2 (common E. Asian deficiency polymorphism)
- What exposure context is reported for Alcohol (ethanol)?
- The J-curve (moderate drinking cardioprotective) has been largely reanalyzed away — recent Mendelian randomization and bias-corrected analyses (Zhao 2023 JAMA Network Open) suggest no benefit at any level.
This is an independent synthesis of published research by a non-clinician. Scores are opinions supported by citations, not prescriptions. See the full disclaimer and methodology for how this score was produced and what it does and doesn't mean.