Better Brain Fitness (a Brainjo Production) 14: How Much Alcohol Is Too Much For The Brain?
Apr 25, 2023
They debate how drinking affects brain structure and volume, citing large population data. They explain tissue adaptation and why past ideas about moderate drinking may be flawed. Practical tips for reducing intake, protecting brain health with nutrition, sleep, and exercise, and ways to replace routine drinking habits are explored.
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Podcast Story About Liver Example Causing Shock
- Tommy Wood told a story about using liver enzyme upregulation as an example on another podcast and getting a shocked reaction.
- He clarified he wasn't promoting drinking for health, only illustrating that tissues adapt to repeated demands like alcohol metabolism.
Liver Adapts By Upregulating Alcohol Enzymes
- Tissues upregulate enzymes in response to repeated exposure, so regular alcohol raises liver detox pathways like CYP2E1 and acetaldehyde dehydrogenase.
- Tommy Wood used this to illustrate demand-driven tissue adaptation, not a reason to drink for health.
Small Amounts Still Affect Brain Volume
- Alcohol is a neurotoxin and the optimal amount for brain health is likely zero.
- UK Biobank data showed brain volumes decline once average intake exceeds about one UK unit (~8 g ethanol) per day, implying harm above ~1–2 drinks/week.