No Healthy Dose of Alcohol, But Is There a Safe One? With Cliff Harvey

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Episode Summary

Cliff Harvey PhD is back on the podcast, and this one ranges widely before settling on its main subject. Cliff is a registered clinical nutritionist, qualified naturopath and strength and nutrition coach who has been in clinical practice since the late 1990s, and he founded the Holistic Performance Institute. He and Mikki open with wearables — Cliff has swapped an ageing Oura ring for an under-mattress Withings sleep analyser — before getting into whether an already-active person really needs dedicated cardio, and why Mikki has deliberately upped her carbohydrate intake for running after years of being firmly in the low-carb camp.

The second half is a careful working-through of the alcohol evidence. Cliff's central point is a distinction that often gets lost: the research supports the claim that there is no healthy dose of alcohol, but that is not the same as showing there is no safe dose. He walks through why all-cause mortality is the endpoint to start from, where the cancer data genuinely does look different, and why effect sizes at low intakes are small enough to be hard to interpret. Both are clear that alcohol is a toxin and neither is advocating that anyone start drinking. What they are arguing is that absolutist public health messaging that outruns the data erodes trust, and that time spent getting people active would do more good than telling them to drink nothing at all.

Key Topics

Cliff's move from an ageing Oura ring to a Withings under-mattress sleep analyser, what resting heart rate and HRV are and aren't useful for, and Mikki's 59-day Garmin step streak and how it endedThe one thing they openly disagree on: Cliff argues accumulated movement at varying intensities can make structured zone two largely redundant for an already-active person, while Mikki champions aerobic work in its own right and pushes back on messaging that walking plus lifting is all anyone needsWhy Mikki has substantially increased her carbohydrate intake around running after years of being low carb, and the difference she reports in running, recovery and appetiteCliff on the research he co-authored — habitually l